I'm personally like my n800 and how it works.Internet works well, browser handles quite complex sites and more resembles PC than pocket-sized thing.Also, Pidgin is great IM (while built-in IM is quite good, I'm preferring Pidgin).Can you point me better IM client for devices of THIS size?Also, xchat is hard to beat as IRC client for handhelds as well - there is virtually no devices of this size with so featured IRC clietns.Also, it is somehow usable as audio and video player and it has FM radio.I'm in fact pretty happy.

In my opinition, UI is looking good enough.I'm never thinked any GTK-based thing can look so great.The only real issue is that useful screen area is smaller than it should be due to big "system" areas but almost all apps can run in full screen.Imho really weak place is built-in player who does not supports OGG out of the box and too picky in playing of videos and also lacks File -> Open so you have to do some strange actions to play just one file(it is issue on s60 Nokias as well).Also, Mplayer is good thing but still sometimes picky in video playback.Not a big deal since you can recode video to more "comfortable" format, but still it could be implemented better and IMHO Nokia can work together with Mplayer team to improve Mplayer on n800.