With all these new cheap ultra-mobile laptops being announced, things started to get confusing for me, so I created a comparison chart for them and have added it to the Mobileread wiki
here. I hope you find it useful, and please edit it as more information becomes available for these devices.
The devices in the matrix are: OLPC 2B1, Intel Classmate, Palm Foleo, Asus EEE, and the Via Nanobook.