Go for it!

really, it's worth buying. you will be able to do the same as on a N810 (except GPS - external module is sometimes better - think overheat in long trips).

the pad is always available (unlike n810), full SD and mini-usb. this thing is pretty standard.

while i like very very much my new N810, the old N800 is still more likely to be taken with me in trips, 'cause of the full SD things (storing pictures/movies from camera to this great gadget - up to 16GB of storage)

about your fears, i have 1 n800 and 1 n810, none with problems. And in case of problems i don't think starting the n800 after keeping it 30 minutes in the freezer will be a problem, since both my tablets have more the 15 days uptime, you

so, give nokia some money