if i can just claify the use of CB radios in the air - the citizens' band is the citizens band, and can be used for pretty much anything. If you are just chating then i see no reason why you wouldn't be allowed to use them.
I think that they could make a spare slot for "GA Chat" but then again we know the efficiancy of the CAA when it comes to anything that involves a decision - take the issue of licenses
WelshFlyer.