VIA is releasing their own cheap PC later this year, following on the heels of Raspberry Pi and the Chinese-built Allwinner thumbdrive computer. The VIA model uses the new Neo-ITX form factor (i.e. really small), but should work with a Mini-ITX or MicroATX chassis. It will run Android 2.3 and have some flash storage and other niceties like USB, ethernet, audio and video. Cool.
Oh, and it's expected to sell for around fifty bucks.