They have indeed merged. I started out with XM. Most favorite was The Boneyard XM 41. Now it's Hair Nation. I heard the Boneyard is coming back in Jan. 09.
On a side note. Between Cell, DSL, Phone, Satellite radio and Satellite TV, I'm paying over $300.00 per month. Kind of makes you long for the good 'ol days when it was all free.
RUS