I purchased a nokia 770 last year, and it was my first linux device. I consider myself a pretty well educated pc user, and know my way around windows xp pretty well.

I recently purchased and HTC/Sprint Mogul phone that runs WM6. I don't understand why people say WM is hard to use, because I found it so much easier to get around in than Maemo. No repositories to download and the programs are much much more stable than what I've used on the 770, which crashes often. Plus, it runs a lot of older wm software, and I found tons of free software (and hacked :-P) to choose from. And it can cut/copy/paste just fine.

The user support for this thing is awesome (see xdadevelopers.com). I've been running a cooked 6.1 Rom, and have been able to (easily) install a great number of applications. I have 3 web browsers, tcmp media player, i-GO gps/navigation software, gps enabled google maps, mp3 player, excel and word, pdf reader, photo album, mobiTV (streaming television), pocketRAR, and others.

Honestly, other than the nice screen, I don't miss anything about the 770. Since the phone has EVDO and wifi, I pretty much have no use for the nokia device any more and will be selling it soon. And the new HTC devices getting a 640x480 resolution screen, which is twice as much as the current phones.

I imagine the n810 is probably a bit faster than the 770 and maybe more stable, but in the end, I get more with the HTC mogul and it has become my portable device of choice.