What interfaces are available?
A. There are dozens, in price ranges from $30-$40 to several thousand dollars. Some examples include: Griffin iMic (Audio Only) (Good for inexpensive Tape Recorder type Mics as well as Line-Level devices such as Mixers) GuitarPlug (Audio Only) MicPlug (Audio Only) MobilePre (Audio Only) Tascam US-122 (Audio / MIDI) Presonus FireBox (Audio / MIDI) Presonus FirePod (Audio / MIDI) (This is the device I use, and love it! [Disclaimer]) Metric Halo (Audio Only) MIDISport UNO (MIDI Only) Edirol UM1SX (MIDI Only) There are many many others, all with different feature sets and in different price ranges. Brain Battles has created a chart with lots of comments comparing some FireWire interfaces. Even if you re not in the market for the exact models he discusses, you may find information to help you understand the differences between various devices, and help you choose the right one for yourself.