Interested in music in SL? Turns out there's a record label in the game - and Eric Rice owns it. Remember him - he wrote the article about understanding hte game. Turns out he's a designer and is helping groups get online (groups including microsoft)

here's a post from his blog about the music - http://blog.ericrice.com/blog/_archives/2006/4/20/1899927.html

and here's a link to a blog post about the microsoft island, including a SLURL to it - 
http://www.secretlair.com/index.php?/clickableculture/microsoft_quietly_creeps_into_second_life/