I think it would be awesome if there was a way to lock and unlock specific folders in the new ios 4.0. I imagine opening folder and having a little lock icon inside that you could toggle on or off. It seems like a great idea, especially for people who have snoopers pickin up your phone whenever you're not looking, and goin thru your stuff. Another reason why I personally would love it is because I let my 3 year old play games on my phone, but every time I get it back things are changed or deleted. It would be nice to lock my utilities folder.