Positional Alarm Clock

Here is a cool idea: AJ talks about using the locational detection capabilities of mobile phones to create a new kind of alarm clock, one based on position rather than time.

So instead of putting a note in my palm pilot that says "3pm - buy milk", I'd put one in that says "Grocery store - buy milk". Cool.

But with all this geolocating, I think we can go beyond fixed points. With a buddy list of friends, similarly armed and agreeing to geolocate each other, I want to set an alarm that says "Joey - ask him about IPods".

“Hi Joey! Oh, just a minute. My phone is ringing. Oh yeah, about those IPod's...

Perhaps I can e-mail Joey's phone a "proximity appointment": "next time you see me, remind me I owe you $10 for the movie last night."