Well, I can testify that it works great on my M1001! I'm listening to Ngoma right now. I can listen to most of the channels on my satellite receiver, but this is a great way to get the "Internet exclusive" channels. No PAD data (song titles); all it says in the name of the channel, but as a friend of mine would say, this discovery is HUGE!
BTW --Whois says the domain xstreamxm.com is run by Ziggy, who is the owner of http://myradiostore.us
so its not officially run by XM. I think we owe a big thanks to his generousity and for his never ending devotion to "All things XM".