iMic
USB Audio Interface

The iMic™ universal audio adapter is a USB device that adds a stereo input and output to your Mac or PC. This allows the connection of virtually any microphone or sound input device to the iBook, Titanium PowerBook, PowerMac or any other Mac or PC with a USB port. Currently shipping, the iMic supports both line and Mic level input as well as line level output for any USB capable computer.

By using USB, the iMic provides significantly superior audio input and output performance over built in audio. The iMic is a must have product for people who are serious about getting high quality audio in or out of their computers. The iMic not only provides amazingly high quality performance but is remarkably inexpensive at a suggested retail price of $35.