I've been very happy with mine. I have a ThinkOutside bluetooth keyboard, a spare battery pack, and a bluetooth phone. I've used the N800 as my only computer for the past two months, and it's performed wonderfully. I download and watch videos, read and respond to e-mail, surf, and IM. At some point, I'll experiment with on-device software development and compiling. I might even port TeX at some point, in order to do document creation.

A faster processor /might/ be nice, as would speedier screen updates. The only thing that doesn't work for me is watching videos on Revver.com, because they end up too stuttery. Well, that and USB Host Mode, which works only if you wave a dead chicken over it and say the proper incantation. Other than that, it works wonderfully.