Could you make a business from this?

Setup a system which combines helium balloons lifting video camera platforms, and raise them at 3 or more locations of an outdoor event. The platforms should allow remote control of viewing angle and zoom level, likely constructed in a half-bubble inverted dome arrangement. With a wireless video signal transmitted to a control station on the ground, you could view any area of the event. This could be useful for surveillance, live actions shots (for sporting events), promotional photos and the like.

Maybe it could be used over hazardous areas (remote viewing of a forest fire). A level of autonomy could be added to the system as well... maybe tracking an individual in the crowd if they were suspected of stealing something. Likely a lot of privacy issues to deal with there, however.

Update 2006/06/13: I just saw this very thing floating near where I work. It's run by Blimp Pics, and they provide low altitude aerial photography. Check out their site at http://www.blimppics.com/