i don't remember what prompted it, but i also bought a nokia n810 the other week. i bought a nokia 770 two years ago and it sucked, but now that it has a physical keyboard and gps, i figured i'd give it another try.
i found the casing to be a bit flimsy. when the keyboard was extended downward, the display wouldn't sit still and would kind of tilt one way or the other. the keyboard was not very easy to type on, but certainly easier than pecking at an on-screen keyboard like with the 770.