"Do you know who is on XM?"
They seemed to have 2 pairs of announcers, but here is their lineup:
http://www.xmradio.com/programming/xm_staff.jsp?ch=147
Says he the originator of GOOOOOOOOOL!
XM is excellent. ESPN is bad. ABC is the worst thing ever. On the weekends (if I watch the game live) I set up a TV in my garage and watched the game with XM blasting out of my car. I did not mind the dual audio, even with the 5 second delay on XM, because of the wonderful color and commentary from XM.