i already used google sync for my calendars. am i just supposed to go to the exchange account and slide "mail" to on just like my calendar is on? anything else?
I would imagine that's all you have to do. Check your mail settings to make sure they're correct and you should be fine. I used this and it worked perfectly.
http://www.google.com/support/mobile/bin/answer.py?answer=138740&topic=14252