I had iOS5 GM. Honestly, i'm not keen on some of the things they've added. I'm very happy with how my phone is at the moment. Of course, with upgrading to iOS 5 I had to transition MobileMe to iCloud. Now i've downgraded to 4 again, mobileme (obviously) won't sync, and as far as i'm aware there's no way to add calendar/email syncing with iOS4. Anyone have any tips or ideas? Do you think they'll add the functionality in a .x update?