I'm using the Audiovox system I posted about in this thread
Not at all like what you're talking about, but other than being rather bulky and no good place to mount in the vehicle without it looking obnoxious, it works on the AUX IN, esp after I fixed the loose connection!
A sat. tuner like the empeg tuner with info displayed on the empeg would be nice. I am now confusing myself when looking at either screen and forgetting if I'm on Sirius or empeg...