For facebook and IM, n900 is probably the best there is. It integrates both into its conversations mode. The music player works fine, but the playlist creation is... fiddly.

N900 is weak if you want extremely rich phone features like voice dialling or even individualised ringtones. It's a bit thin on business items - some of the obscure MfE stuff, email and the calendar are feature-poor.

N900 is great for being online, for browsing with a proper (not mobile) browser. It has a superb screen for viewing video, and TV out if you want to watch your stuff on a full sized screen. It also happily draws internet radio. It will send its sound output to your car-radio via an fm transmitter, too. And the camera will blow holes in what your iphone could do, as Nokia use Cark Zeiss lenses and good software.

Mooch around here a little - you will find plenty of threads about its weak spots! And plenty of people who are utterly happy with the device.

And welcome.