For the past few weeks, Hypebot (a great blog for musicians) has been soliciting feedback from industry people about the idea of giving music away free. He asked me to contribute to the thread. You can find my post here.
It is definitely a controversial topic. One thing is for sure, free music is not going away, so having a strategy to use "free" effectively should be something all musicians are thinking about.
Here are some links to insightful posts about "free" and the future of music.