Just curious - when I get the new iPhone 4, will I be able to restore from one of my 3GS backups in order to get all my settings/saved app data, all that good stuff?
I did that originally. Then when my wife had problems and we took her iPhone 4 to the genius bar, the guy said that was probably why it wasn't working right for her. Naturally we followed his instructions to restore as new and lost all user data from her apps. Not sure yet if it resolved any issues.