Got this in my email earlier tonight from Carfax. Free 2 months of SirusXM, with all premium channels, and online streaming for inactive factory installed satellite radios. I was able to activate in both my 2011 Optima and 2012 Journey immediately with no credit card required. Obviously YMMV, but it seems to work with all inactive factory radios...
2 months free [siriusxm.com]
NOTE: As I said above, this is published for inactive factory installed radios, so probably doesn't work for aftermarket installed radios.
It does require a satellite radio to listen to SiriusXM (other than online streaming), it will not work over FM.
No, this does not have HDMI.