A few new features have been pushed in the last two days. Most significant is rtl_adsb, a fast and simple ADS-B decoder. It is not the most sensitive decoder (Prog's and rtl-1090 pick up a few more planes) but it works fairly well. Of course it lacks the interactive maps of other software, however the output can be piped into fancier programs or across the network with netcat. To use it, just run "rtl_adsb". It does not need any options and can pick up plenty of signals with only the stock antenna.