I advise school on UMPC and other hardware.
In my opinion the main options you need to look for in the UMPC's are;
Intel Atom N270 over the Via and celeron m because of battery life and heat generation
6 Cell battery
2.5" HDD instead of solid slate (at the moment due to pricing). when the 32Gb Solid slate option is cost effective then will look at this.
Warranty is also important.
Warranty is a tricky one as al the companies apart from HP have not thought about warranty packages. I have spoken directly with Asus and MSI. It is almost like they didn't want to offer onsite support or better turn around options.
UMPC's i currently promote are;
ASUS EEE 1000h
MSI Wind
Toshiba
Samsung NC10
Acer Aspire
I have contact with suppliers who can get competitive pricing if anyone needs.
