The DirecTV / XM Satellite Radio deal launched today. If you're a DirecTV subscriber, you can tune in to the 72 XM Satellite Radio channels offered on DirecTV on channels 801 - 879.

The addition of XM to DirecTV's offering nearly doubles DirecTV's music offering at no additional cost. DirecTV subscribers get more than just music and children's programming, but other fun things like MLB "Home Plate" as well as High Voltage with Opie and Anthony.

So here's the breakdown:

• DirecTV Total Choice customers get access to 50 XM Channels
• DirecTV Total Choice Plus subscribers get over 65 XM Channels
• DirecTV Para Todos customers will also get the same XM channels, plus an additional 5 Latin music channels.