http://www.camaro5.com/forums/showthread.php?t=50996
What devices are compatible with the USB port?
Most USB flash drives, 5th Generation iPods and newer, Micrsosoft Zunes, and many “PlaysForSure” devices made by other companies such as Sandisk Sansa players. For more details on which MP3 players are compatible, see
this PDF. Note: many older iPods will work however they will function as USB flash drives and not as an iPod. Camaro5 member RandyB put together
a nice rundown of some of the various options