Fujistu U2010 UMPC claims 11.1 hours of runtime on extended battery.
(On the extended battery on the U810, I can't remember how long I got, per charge, with the extended battery. But it was nowhere near 11 hours.)
The pros: it now has a proper tab key, in almost the the normal position, and the keyboard is clearly much-improved over the oddly laid-out U1010/U810.
The cons: The screen-bezel ratio is still gruesome. Built-in 3G, shown off at CES 2008 in a prototype, never did make it in. Which is a shame, because the OLPC-like antenna ears were cute.
Given the specs, you'll be wanting to make sure you get an XP downgrade disk with the included Vista.
If only they released them with the art in the West! Unfortunately, it will only be offered in Japan. Our choices are silver, black and pink.
Fujitsu's Lifebook U2010 (FMV-Biblo Loox U) Hands-on [Akihabara News]

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It's always disparaging to see interesting hardware bundled with Windows.
No matter how great the hardware design of a new laptop is, it's still chained to the restraints of the operating system it comes bundled with. I'd love to see laptops like this one have custom Linux builds, like some other UMPCs, or some other variation.
1280x800 = win
tablet design = win
The only thing I don't like about this machine is the lack of pointing device.
That's less of a drawback than some crappy 1024x600 screen though.
XP downgrade? Why not upgrade to Ubuntu, or Ubuntu Netbook Remix?
It does have a pointing device. A small stylus is included in the top edge of the LCD. Don't rule out XP yet.
This is pretty darn good. Why do I get the feeling it will cost $3000?
I wish my iphone got that kind of battery life.