I am at 17% left with only barely 8 hrs of use.
( Wifi and syncing was on all the time, but surprisingly "Android OS" jumped to the top again and ate 37% of the battery use today (kinda back to 403 style). No bloody idea why such result today...
Battery usage stats for today:
Android OS 37%
Exchange Services 36%
Screen 6% (only! Perhaps due to the phone being in sleep mode for most of today)
Voice calls 5%
Wifi 5%
Mobile 4%
Email 4%
Android system 2%
Idle 2%