Don't get me started on XM/Sirius/whatever
Most stations, despite a live DJ (I think), play the same 40-50 songs all day everyday, often on the same timetable. So if you heard say Free Bird at 2pm, you'll hear it the following day at the same time within 20ish min. And I'd imagine every station is like this.
It came free in my truck for a year, sweet. The only reason I kept it was because I was able to keep swinging the $6/month thing, and I really only want to tune into the Dead channel whenever I please, and only because Lemieux has an excellent rotation of live shows. But even they play the same studio cuts at the same time of day. If it weren't for the fact that I'm still rebuilding my music server, I'd likely have dropped them, but still, any mainstream radio service is pretty much poopy.