Thanks everyone for taking the time to reply, and for your welcome.
This is just the embryo of an idea, I wanted to throw it out there to see if people would just say "this has been done to death, people have tried before, it never works because of x, y and z", then I could forget about it and stop daydreaming :-)
But it sounds like it could require some more thought, and careful consideration of which CGs might be:
a) interested in the potential returns on what they would need to spend, and
b) technically feasible
