So, where is the best place to buy a new Nokia N810?

Do Facebook games/apps work on the N810?

What games work with it? Best place to download apps/games?

best place to buy is here, except you'll probably only find used ones here. reconsider buying used, as long as there's no damage to the screen. incredible deals pop up here every now and again. with some patience, you can probably snag one (lightly used) for... $125-150. no promises, but i think i've seen them that low. and people selling here usually throw in the case and a couple of flash memory cards too.

facebook games work ok. i played jetman on mine, and fantastic contraption (not a facebook app), and they didn't crash the tablet, but they weren't really "playable", in my opinion.

Check out maemo.org/downloads and go to the games section or simply search here for games. There's some pretty sweet nostalgic stuff available that's very stable, like quake and doom and descent, and also some fun puzzle games, like hexahop, and barrage is a pretty fun mindless shooting action game. oh, and you MUST try numptyphysics! the quintessential tablet game.

n810 for sale right now here in the forums:
http://talk.maemo.org/showthread.php?t=30003