Just some clarification from someone who's been watching the project for awhile. The initial batch of boards will only be the model B, which is $35 (plus S&H), and because of expected demand, will be limited to one per household. This version will have ethernet, 256M of ram, a 700 mhz ARM 11 CPU, 2 USB ports, and will most likely officially run a version of the Fedora linux distribution from the built in SD card slot (card sold separately). It runs off of a USB power cable, though for the model B the power requirements are greater than USB 2 can supply, so it will need to be powered by a USB charger with high current capabilities or (I believe) by a USB 3 port.