Bidirectional Video & Data Transmission from an Airplane?

airjose asks: "I 'work' (if you can call it that) for Skydive DeLand in Florida. We have a Hi-8 camcorder shooting exit images, and I would like to transmit them to the ground. I can get 2.4 GHz video transmitters for $1200 (we are flying the plane at 13,500 feet) but I'm hoping to get two way video and data services. Is this would be too expensive, or are there cheaper solutions?"