Ran into a weird one here... with a iPhone 3G (iOS4) when I go through the initial configuration on the device everything seems to work. However, as soon as I perform the first sync nothing comes across. No errors to speak of, just an empty mailbox. I can see all of the folders in my GW mailbox but no email. On the mobility server my account is highlighted green, so it would seem that everything is working, but nothing is ever pulled down to my device. I also tried the Apple issued update for exchange/activesync (increased timeout) to no avail either. This is with the latest Mobility pack build installed as well.