Which is best for reading pdfs?
n800 is better than the android htc magic my wife has, but my buddy showed me some software on the iphone 3gs which was much better that anything Ive seen (much better than evince on n800).

Fbreader
is available for both android and n900 - tie

Which can run divx avis (no conversion)?
I believe only the n900 has mplayer and can play them, android/iphone can't

Which has the best vnc/rdesktop?
Again I am afraid it might be the iphone 3gs - the vnc software is excellent, Is the VNC app ported to n900 any good?

Best text editor?
n900?

Best voip/skype?
Android implementation of skype is awful.