After a month with my n800, I've come to the opinion that it makes a great companion for a treo, but it doesn't replace one. it certainly offers a much better web browsing experience (mostly), and I much prefer it as a media player to the palm, but the PIM functionality just isn't there. I need seamless exchange sync (and search) (NOT outlook sync), SMS, and the ability to view/edit/save/send office documents. I also find that I actually prefer typing on the tiny 755p keyboard over either the on-screen keyboard on the n800, and sometimes even more than a foldable bt keyboard.

The n800 isn't sold as a enterprise PIM device, like a blackberry or palm, and it isn't one. Using it as one is not going to be a satisfying experience, IMO.

There really isn't much that the n800 does that my 755p can't do, to be honest, even though I always like to have my n800 around because it's such a neat toy, if I had to only take one device on the road with me, it'd be my treo, and it's not even close.