Has anybody used a solo link in a custom drone yet? I notice you can buy the cards for about $50 each. Then add a long range wifi card and you're in business.
3DR has released the firmware and code for it I think?
Rolling a HD VTx, Radio Control, and telemetry all into a single unit is a good idea. The only other thing on the market I can see that will do that is the CUAV hack link. It looks like a capable unit, but i can't find much feedback on it yet. I think the reason for the slow uptake rate is the cost.