Tweak Sez: You can Browse the whole store by Price here.  Just try that in the real world!

Emu 0202 USB 2.0 Audio Interface E-MU's new 0202 USB 2.0 Audio Interface is the ultimate portable USB audio interface for PC, offering pristine 24-bit/192kHz recording and playback, direct monitoring, and a host of professional features in a compact, USB bus-powered package. The 0202 USB sets a new standard in portable USB audio, providing users with two Class-A preamps that can be run independently or in stereo to amplify guitars, keyboards or microphones, with individual ground lift switches for optimal audio performance.
Priced from 109.95

Echo Mia MIDI PC Digital Audio Interface If you're serious about digital audio, you shouldn't settle for anything less than a truly professional audio interface.... and now with Mia MIDI you don't have to. Mia MIDI offers a pair of balanced 1/4 in. analog inputs and outputs and operates at the +4dBu levels used by pro-audio gear. It combines this with 24-bit/96kHz converters and 106 dB of dynamic range for the quality your recordings deserve. Also included is an S/PDIF digital audio interface for connecting to other digital audio equipment, and MIDI input/output jacks on a custom molded cable.
Priced from 119.95

Yamaha Audiogram3 USB Audio Interface (Mac and Windows) With a focus on simplicity and ease-of-use, the Audiogram3 delivers a compact audio interface complete with both a mono and stereo input channel. Providing maximum flexibility for recording from almost any audio source, the mono input channel features a combo-type connector that can be set for microphone or line level input, while the stereo channel has both phone and RCA connectors. Of course, as this interface is USB bus-powered, it needs no external power supply and is an ideal solution for mobile applications.
Priced from 119.95

Steinberg MR816CSX Advanced Integration DSP Studio Firewire Audio Interface Functioning far beyond the envelope of traditional audio devices, MR816 CSX fuses a fully-featured FireWire interface and inbuilt DSP FX power with next-generation integrative technologies into one breathtakingly powerful production environment. Developed by Steinberg and Yamaha, this Advanced Integration DSP Studio is the hardware centerpiece of a latency-free recording and monitoring environment that fully exploits the flexibility and power of Steinberg's renowned Cubase Music Production System.
Priced from 1199.95

M-Audio ProjectMix I/O Control Surface/Interface Today, more professional music is produced at home than ever before -- and the new ProjectMix I/O delivers what you need to take your computer-based studio and productions to the next level. Seamless integration with all major DAW software. The ability to record directly into industry-standard Pro Tools sessions. Faders so you can feel the mix with your fingertips instead of dragging a mouse. On-board display of critical parameters for intuitive operation. Motorized control to craft more accurate mixes.
Priced from 1249.00

M-Audio MobilePre USB Interface with Microphone Preamp MobilePre USB is the perfect audio interface and preamp for your laptop recording needs. A total of three kinds of audio inputs and outputs provide maximum flexibility for any application-including two on-board microphone/instrument preamps and high-impedance instrument inputs ideal for connecting guitars and basses.
Priced from 129.00

Tascam US122L USB 2.0 Audio/MIDI Interface Record two tracks at a time with zero latency; whether you have a PC or a Mac, your song ideas go down in real time, real easy. Its size means you can take it anywhere you take your laptop, yet it's packed with features that make buying it an audio no-brainer. MIDI input and output, high quality mic inputs, 96kHz/24-bit recording (better than CD quality)-all the stuff you'd want without the fluff you wouldn't. The US-122L: the answer to your recording needs.
Priced from 129.00

Behringer UMA25S U-Control 25-Key MIDI Controller with USB Audio Interface The UMA25S is a super-slim controller keyboard with a fully fledged USB audio interface. It has 25 velocity-sensitive keys for the slickest set of glissandos and snappiest of arpeggios.
Priced from 129.95

RME Fireface 400 FireWire Audio Interface Just another killer interface from RME: The Fireface 400 is the only one in its class with active jitter suppression, stand-alone functionality, off-line MIDI remote controllability, highly flexible I/Os in professional quality, an unsurpassed 648-channel matrix router -- at sample rates up to 192 kHz
Priced from 1299.00

Emu Tracker Pre USB 2.0 Audio Interface E-MU's Tracker Pre USB 2.0 Audio Interface/Mobile Preamp is the ultimate portable USB audio interface for Mac and PC, offering pristine 24-bit/192kHz recording and playback, direct monitoring, and a host of professional features in a compact, USB bus-powered package. The Tracker Pre USB provides users with two Class-A ultra-low noise Mic/Line/Hi-Z preamplifiers that can be run independently or in stereo to record guitars, keyboards or microphones with optimal audio performance. CurrentMorph, a patent-pending circuit design, allows Tracker Pre to offer +48V phantom power and use premium high-power converters while using only USB bus power.
Priced from 139.95

Mark of the Unicorn (MOTU) 24IO 24-Channel Audio Interface The MOTU Audio 24I/O interface fulfills the promise of host-based hard disk recording: to record, edit, mix process, and master multi-track recording projects entirely inside the computer. It provides 24 high quality, 24-bit/96kHz analog inputs and outputs in a cost effective, single rack space package, allowing you to connect and record from 24 simultaneous analog sources.
Priced from 1429.95

Edirol UA4FX USB Audio Interface with MIDI An international top-seller for years, Edirol's UA-series interfaces brought amazing value to computer-recording enthusiasts. Today, Edirol pushes the price/performance envelope again with the new UA-4FX. The portable USB audio/MIDI interface sets a new standard for affordable interfaces with its ultra-fast, low-latency audio & MIDI performance, 24/96 audio resolution, and built-in effects -- including a COSM tube mic-preamp simulator for fattening up your tracks. The UA-4FX also includes a copy of Cakewalk's Sonar LE recording software and Edirol Virtual Sound Canvas plug-in (PC), making it a true all-in-one recording solution at an incredibly low price.
Priced from 149.00

M-Audio Midisport 4x4 Anniversary Edition USB MIDI Interface In commemoration of M-Audio's 20th anniversary, the Midiman Midisport 4x4 Anniversary Edition gives the popular multi-port USB MIDI interface an updated new look. Midisport 4x4 Anniversary Edition addresses a total of 64 x 64 discrete channels of MIDI I/O via USB, allowing you to simultaneously connect a variety of MIDI devices. Bus-powered architecture provides the option of totally mobile operation.
Priced from 149.00

Tascam US144 USB 2.0 Audio/MIDI Interface Record two tracks at a time with zero latency; whether you have a PC or a Mac, your song ideas go down in real time, real easy. Its size means you can take it anywhere you take your laptop, yet it's packed with features that make buying it an audio no-brainer. MIDI input and output, high quality mic inputs, 96kHz/24-bit recording (better than CD quality)-all the stuff you'd want without the fluff you wouldn't. The US-144: the answer to your recording needs.
Priced from 149.00

Ion Audio VCR2PC VHS USB Video Interface The Ion Audio VCR2PC breathes new life into your old VHS tapes by making it easy for you to capture them on your home computer. The Ion VCR2PC is an innovative new VCR with single-cable USB output. Save all of your VHS movies, family video, and personal video tapes directly to your PC. You’ll never have to dig for tapes again or worry if they will work. Your videotapes will be saved forever in pristine digital format.
Priced from 149.95

Yamaha Audiogram6 USB Audio Interface (Mac and Windows) With the Audiogram6, you get a powerful mixer-type audio interface with two mono input channels and two stereo input channels. Each of the two mono channels features combo-type connectors for direct connection of a wide range of sound input devices. And because you can change the input sensitivity of each channel for direct connection of electric guitars and basses with a push of the MIC/INST select buttons, there's no need to study up on impedance and other specialist recording topics.
Priced from 149.95

Alesis IO2 2-Channel Portable 24/48 USB Audio Interface Designed as the ideal Audio/MIDI companion to notebook computer-based recording environments, the iO2 USB has a compact form factor that can easily fit in a laptop case or small backpack. The iO2 USB features durable aluminum casing, USB power (eliminating cumbersome external power supplies) and is optimized for minimal laptop battery drain.
Priced from 159.00

RME Fireface 800 Firewire Audio Interface After more than 2 years of development, the time has come: RME presents the Fireface 800, the world's most powerful FireWire audio interface ever. Up to 56 channels record/playback, up to 192 kHz sample rate, and true FireWire 800 sum up to an unsurpassed high-end, high performance and high speed FireWire audio interface.
Priced from 1699.00

M-Audio Audiophile 192 64-Bit PCI Audio Interface The Audiophile 192 continues the legacy of M-Audio's industry-standard Delta audio card line. Building on M-Audio's Audiophile 2496?one of the world's most popular audio cards'the Audiophile 192 features high-definition 192kHz sampling rate, digital I/O, balanced analog I/O and an amazing signal-to-noise ratio. The Audiophile 192 represents a new benchmark in audio performance that's as good as it gets for music production, mastering and critical listening.
Priced from 179.00

M-Audio Delta 66 Audio Interface The Delta 66 was designed for the person requiring an audio card with professional features and performance, but with a price tag well below that of typical pro gear.
Priced from 179.00

Echo AudioFire2 Compact FireWire Audio Interface AudioFire2 offers an extremely small FireWire audio solution. No product this small comes packed with as many features as the AudioFire2. Fully balanced input and output, separately addressable headphone output, S/PDIF I/O and MIDI I/O are all included in this 3.5 in. by 4.25 in. interface.
Priced from 179.95

Mackie Onyx Satellite FireWire Audio Interface Onyx Satellite represents a breakthrough for computer-based audio and music production. As the world's first two-piece FireWire recording system, Satellite consists of a portable recording Pod with premium Onyx mic preamps, and a desktop Base Station with additional inputs and outputs. You simply undock the Pod when you want to record on location—leaving the Base Station connected to all your desktop studio gear (microphones, instruments, headphones, studio monitors, etc.). Then, once you've returned to your studio, simply dock the Satellite Pod back into the Base Station with a reassuring “click.”
Priced from 179.95

Lexicon Omega Studio USB Audio Interface (Macintosh and Windows) Nothing is more frustrating than buying a 'recording system,' only to find out that you need a gaggle of extras just to make it all work. Omega Studio is a completely integrated computer recording system that includes the Omega 8x4x2 USB I/O Mixer, Steinberg's Cubase LE audio and MIDI recording software, and Lexicon's world-class Pantheon VST Reverb plug-in. The Omega Desktop Recording Studio quite literally contains all the necessary components to transform your computer into a professional 24-bit recording studio - all in one box.
Priced from 199.00

M-Audio Fast Track Pro USB Audio Interface The Fast Track Pro delivers all the mobile recording flexibility of the Fast Track USB, plus even more professional features. You get 2 front-panel mic/line inputs complete with phantom power for condenser microphones, inserts for outboard effects balanced and unbalanced analog outputs, S/PDIF digital I/O, MIDI I/O, and more.
Priced from 199.00

M-Audio Firewire Solo Audio Interface The FireWire Solo is designed from the ground up as an easy-to-use, high-quality interface for songwriters to record guitars, vocals and more on the computer. Compatible with most popular music software, this compact bus-powered unit is small enough to go anywhere you want to take your music. In addition to the 1/4 in. guitar input right on the front panel, a professional XLR microphone input also lets you record vocals and acoustic instruments. There are also dual line inputs for effects, drum machines and other outboard gear. FireWire connectivity, up to 24-bit/96kHz sample rate support and digital I/O all add up to outstanding sonic performance. As simple to connect and operate as it is powerful, FireWire Solo is the foundation of your computer-based songwriting studio.
Priced from 199.00