Mail for Exchange works fine for google calendar for me. just calendar, not contacts. device is set to overwrite google's cloud calendar. so far no problems!

i've heard good things about nuevasync also. however i got the native email app working with my gmail and MfE working for calendar so i didn't see the need for a third party solution.

used this link for both email + calendar sync:

http://www.google.com/support/forum/...8dea5ed7&hl=en