[umbra]

I don't know if this will help much, but I found one thing that increased my battery life by 3-4 hours. The thing I did was turn off Google Talk's automatic sign in. It seems that this program was constantly contacting the Google servers to update the status of my Google contacts. Try it and see if it helps out your battery life. To disable open the drawer and click on Talk -> Menu -> More -> Settings then uncheck "automatically sign in" then kill that task or reboot your phone.

Before I did this I got around 8 hours with the same usage that I use now, which is about 12-14 hours. This includes syncing with an Exchange server, using the phone for at least an hour or 2, having the weather refresh every hour, have 2 pop accounts check every hour, Freindstream update every 2 hours, and news update every hour. This time is all over 3g and not wifi because I figure since Im paying for the access I may as well use it. My device is also rooted with RvU1.3.

This "fix" will of course not help you if you do use Google Talk though...

-Umbra