YouTube video courtesy of ShareATT

Hmm... Interesting... But do we really want virtual tagging?

AT&T researchers testing AirGraffiti concept. Leave a location-based message that others can find in air

AT&T's research project lets people attach media (video, photos) to a location that can be accessed by other people who may be in that area at a later time. It doesn't sound much different from many other location based services such as Yelp that lets you see what other people may have said about something in that area.

Note to AT&T: Could you please spend some research time to figure out how to get your network to the point where iPhone tethering service can be turned on for a reasonable price?