quick suggestion about S2U2 settings. Try putting your settings to "ignore screen rotation" I've been running the 2.0 or better S2U2 and have had ZERO battery issue. Til earlier tonight, when I messed around with the settings. With Scrn rotate on...(where you get your landscape S2U2 when you slide your keyboard out)...I was literally able to drain the batt by continuously rotating the phone (without sliding the keyboard out)
Give is a shot, I run mine with weather/sms/email push to my S2U2 screen. I do not have any data connection problems. Nor do I have any battery drain problems.
hit thnx if this helps YOU