Kirk, with respect, are you holding your breath for all those club gliders to get Flarm? ADSB is CLEARLY the 'way to go' for best traffic awareness in the USA.

Traffic awareness=head down in cockpit looking at a screen (ADS-B). Aural warning of conflicting traffic with direction=see and avoid (FLARM). Glider algorithms with few false alarms (FLARM). What development/testing of ADS-B in gliders has been done? How does it handle busy thermals?