Excellent info - after looking through many of the items on your list I can see that video rules the net. Wow.
Specifically, it’s important to get uploaded on to Facebook , myspace, and youtube video/music.
Your friend makes a choice if the song will be distributed free or not, if free you can post it on various locations, it becomes a viral advertising campaign and it’s up to the musicians and their friends to pump the message out there.
as someone else of FR turned me on to it yesterday and it is relevant to you, sign up for twitter and send a link to the music to these guys:
toplibertariansontwitter.org/
here is a more comprehensive list of video sharing sites ranked by Alexa.com (alexa.com installs opt-in spyware to track usage, so it’s a self selecting by stupidity levels as to what the company tracks, none the less, it’s useful for rankings)
http://www.reelseo.com/list-video-sharing-websites/