Well, it works for me. I find new and useful things to do with the tablet every day (okay, that's hyperbole, but let's just say "with regularity"). For example, just this weekend I installed qole's easy-debian (which was painless for even a linux noob such as myself), and I now have open office that fits in my pocket.

Sure, "jack of all trades and master of none" is a fair description of the N800/N810. It's also quite a bit slower than a full-fledged home computer/office workstation. So, the device is not for everyone, but there are a lot of people (like myself) who are willing to accept a tradeoff in performance for pocketability.