I have acquired some info/pics of a new mini-pc that Radioshack is slated to start selling next month. It's a about the size of a shoebox and appears to use some kind of AMD chip. It also appears to be powered off a round DC power plug. Here's a link to the pic and more details. I was thinking this might make a good car-pc depending on what the guts consist of exactly. I'll try to find out more on this once they become available.
http://www.irrision.com/?p=10
http://www.irrision.com/?p=10