I have a Jailbroken iPhone with SBSettings and the Rotation switch. First I find no problems with the rotation, I have a 1g iphone for more than a year now, and the only problem I had with rotation was when I was laying, with that SBsettings switch, it's solved. Second, I agree that SBsettings is the most useful iPhone App and Apple should really look into its features and make them builtin.