You try the link in his sig? I think there's dimensions there, but if not, just search around a bit. They're on one of the three or so Pandora sites, which seem more-or-less equal in officialness.

WRT communities, I hope Debian is sufficiently faith-inspiring? It's likely, from what I've seen, that Debian will work nicely on the Pandoras with no closed-source components required.

As for Nokia, I think the N810 is hardware-wise ahead of most competitors; the
N800 is just better because it's so much ahead of the competitors. (No, there's no good reason for falling behind, IMHO, but that doesn't make it worse than it is.) And the next hardware version will be a lot better, though I must confess I'm concerned they may keep some of the external blunders.