Ooooh i like this idea. A very nice convience feature that should definatly be looked at by cell phone manufacturers. Also a way for a maker to "one-up" the competition in the "feature" game.

This would definately have a market. Students would find it very useful. Good idea.

My phone already does that. (It's a Nokia.) You set a time for the ringing profile to expire, then it returns to a default profile.