I've been pondering a smart phone since they've been getting better and it's not because I want a phone but I want a MID (Mobile Internet Device) that connects everywhere so I have constant connectivity to IM, email, web etc.. With the n800 you have to be near an open wifi access point which gets irritating to say the least. Using DNS tunnelling you can connect through many access points that are open but require monthly fees but since AT&T opened their access points at Starbucks and Barnes & Noble this is less useful. I was really excited about the n810 wimax edition but Nokia pulled it because of a lack of wimax network. Now I see Sprint advertising 4G with their Palm Pre which is wimax. We still don't have access in the Seattle area although it's coming. So I've narrowed my choice down to an Android phone (not the G1) the Palm Pre or Nokia's new MID/Phone the n900.
To be honest the Maemo OS on the n800 isn't that great but it gets the job done. It can be unstable, the apps are amateurish and it needs to be reloaded every so often so I wasn't that excited about the n900 but it seems that Nokia has actually gotten serious about Maemo. The screenshots look wonderful and it looks like they've decided to actually make an interface for a small device instead of a tiny computer Desktop.