With active standby off and just using the phone sans the communicator interface , I get btw 2.5 days (60 hours) to 3.0 days (72 hours)
Lithium Polymer batteries on such a device would be a nice thing , I tend to use the speaker phone alot in the phone mode with the cover closed.
Beyond that and the initial problem of sending files via bluetooth to the common inbox in messaging and initial mms messages , the messaging app for whatever reason sorted itself out , I use TaskMan instead of the default task manager at normally have 73 mb free at any time and I make sure to close all open apps that can be closed once I've made a call , checked a contact , sent an mms and so on and so on.
Route 66 and Smart2Go work quite nicely on the small screen as well :=)
.... if you have wlan scan on the whole time, as well as bluetooth, that will seriously nail your battery... don't think you'd get half a day out of a WM device with the same on.