I would love to have one of these.  I just stumbled upon this website today and found the OQO (pronunciation anyone?), purportedly the world's smallest Windows XP computer.  If nothing else but for the sheer “fun-ness” of having one, I'd like to try it out.  I seriously doubt I could make it a development machine what for the whole form factor, but it'd be a blast to use and test applications on.

It seems quite capable with 512 MB RAM, USB 2.0, Firewire, wireless (even though it's only 802.11b and not g), full keyboard, mouse, tablet PC support, 30 GB drive...it would simply be a cool little device.

Personally, I think the $1000 price difference between the XP Pro and Tablet versions is a bit exorbitant (maybe $300-500 would be more palatable), but I'm sure that's the niche.  I wouldn't want one without Tablet support.

I don't see me getting one (at least until I've saved my clams for a few years), but it sure would be fun to play with.