Magnatune is now present on Second Life.

I would like to recommend Magnatune as a great source for Podcast music. They offer online licensing for various scenarios.

Their Second Life presence give you the ability to add music to your land. You can choose between 40 genres at no cost. And for the experts you get a free T-shirt for your avatar.

Not a member of Second Life, then you should look at: http://www.secondlife.com/join/

Perhaps we will meet there...