Lee, thanks, I look forward to learning more about your "cunning Plan" !!
On a separate subject, I would also support the establishing of PA ground stations and would certainly be happy to host one if no progress is made with OGN. I would think with the relative hi power O/P of the PA transmitter, it would have a pretty good range to a ground station giving good coverage if the ground receiver antenna is in a clear location.
Unfortunately I have no knowledge of servers and programming so cannot provide any direct help in implementation but I'm sure amongst this group we must have some that are knowledgeable in this area
I don't believe PA will have any significant take up in the gliding community, Flarm is too well established, however in the GA community I think you have a winner. The extremely low cost of build, open protocol and small size all seem very attractive to implement as an anti collision system. Even as ADS-B takes hold in GA, to just have your low cost device as a receiver only displaying other traffic including ADS-B on an iPad is magic.
I also found recently another use; in implementing ADS-B on an existing aircraft installation, it is hard to do an initial test to prove operation and do a check on its performance. I used your device just as a receiver with my iPad and could verify the presence ADS-B transmission on the ground after modification. Then by carrying it in the air on the same aircraft, I could see that the ADS-B GPS position being given corresponded with the actual position of the aircraft as shown on the moving map. A great piece of test equipment !
regards
Alan