Not having a n900 in my paws yet, this may be pie. But I had rather hoped to have a 'profile' for work, which would include "Phone on/internet off" to allow for the fact that i work in an internet dead spot. The '"home" profile would connect to my local wifi, while a "roam" profile would be searching for 3g.

My experience with other devices is that it's a straight draw over what uses battery between leaving the wifi on and using the screen. N900 is designed for you to do both.

I suspect my solution will be a spare battery.