[In Australia . . . . . an enhancement to Flarm could enable it to read ADS-B] Bw asked "That would be interesting. Are we talking 1090ES-based ADS-B? I presume so, since I think that's the Oz choice for ADS-B datalink."
Sorry, I don't know - it's going beyond my limited knowledge. . Dunno if a search of r.a.s. or a Google search would throw up a useful answer.
Chris N.