I did it today with iOS 4 GM. Not really recommended as most of the worthwhile apps aren't up to date: biteSMS, MyWi, etc. Best to hold of until they are upda

I did it today with iOS 4 GM. Not really recommended as most of the worthwhile apps aren't up to date: biteSMS, MyWi, etc. Best to hold of until they are updated. That said, I love iOS 4. Pretty rad.