JamPlug, a division of DVForge, today announced that its new GuitarPlug and MicPlug plug-in form factor USB audio interfaces for Mac OS X are now shipping. The GuitarPlug and MicPlug both measure 2.3″ by .7″, are USB bus powered, with an on-off switch, and a blue LED power indicator. Each converts mono analog audio to 16-bit, 48KHz digital USB audio, is class compliant, and works with any Mac OS X application that accepts USB audio at that data rate. Both products are priced at US$49.99.