XM is still on the wishlist, but we've not committed this feature to a particular release. The iFly does not support bluetooth so if/when this is added you'll need a plug, or a wifi enabled XM device. But, ADSB might be further along than you think. There are numerous tried and true receivers out there, and many more coming. Almost all support wireless via wifi, which the 720 does support. And the cost for these units is down in the $500's, so the ROI over XM happens very quickly.
Thanks,
Walter