XM and Sirius are going to merge as reported by ABC News and the New York Post.
I have been and XM subscriber for about a year and love it. I hope they don't take away any of my favorite stations, but add a few of the Sirius stations that I like.
I also hope that they stick with the XM format of stations so that everything is easy to find. Every ten stations is a subset of music, for example 20-30 are all popular music stations, 31-39 are all religious, 40 through 59 are all genre stations. Sirius doesn't do that as far as I can tell, so it is hard to work your way around it.