I just rcvd my N900 yesterday, and today spent all day out and about from 7:30am until about 4pm. I'm in software sales, and I used the N900 alot today, basically it replaced my laptop. I spent ~2 hours on Wi-Fi in the morning, T-Mo 3G the rest of the day, downloaded and listened to a few podcasts for about an hour, made several phone calls, used email throughout the day (frequently), and also the browser to check stocks and update salesforce.com.

I had wi-fi interval set to 60 mins, but I forgot to change my MfE setting, so it was pushing mail continuously. Ran the battery down to the red bar at around 4pm. Hope to get some additional battery life by changing MfE to 30mins and wi-fi to Never.

To get a good working days use out of it, I am pretty pleased. I only get a couple hours from my laptop, and its a pain to lug around. I could see the N900 replacing my laptop use substantially.

If Docs to Go ever supports doc editing instead of just viewing, there would be few occasions where I would need a laptop.

And the Nokia DC-11 I have en route from Newegg should provide good insurance for a backup charge when on the road.