Part of what I love about sharing music via the internet is the immediacy. Today a
fellow contacted me through ccMixter. "May I use your song in a non-commercial short film?". I reply in substance, "yes, of course, here's how to credit my work". He replies back in substance "Great! I'll send you a link when it's on line".

Never mind that he's in Spain and I'm in Texas USA. Never mind that we've never met, and never corresponded before. Never mind about money, never mind about editorial control. Never mind about production delays, lengthy negotiations, all that.

I post a song, liberally licensed. He confirms the credits, and puts it in a film.
Seamless, easy, and fun beyond belief.