The iPhone needs profiles, work, personal, etc... Similar to user profiles on standard operating systems. You see, I would like to sync my work information, but I do not want to mix it with my personal information. The last thing I want to do is drunkenly email a picture of my dick to someone I've been talking to about migration to a bigger, better and more expensive application.
This idea is free to you Apple. Take it. If the useless piece of shit iPad is any indication the ol' mind grapes are drying up.