Yeah. The gumstix is an interesting plaform (we bought some of these to jump-start a project) basically an x-scale and 16MB flash, 64MB SD-RAM and bluetooth on a PCB the size of a stick of gum (or thereabouts, obviously thicker though!).

The gumstix has nice high density hirose connectors to break out the bus, so peripherals could be easily added via a motherboard and other hirose connectors, a motherboard could obviously provide the basic audio, power section, drive connectors etc.

There's enough talent on here to make this happen, but to me a "dummy" headunit which talked iPod and displayed information empeg-esque would be more useful and more desirable, and considerably simpler. (hardware and very little software required)

Adrian