I often find inspiration in song lyrics as well. As a matter of fact, I wrote "Requited Love" while listening to "Blue" by Angie Hart over and over again, and I make mention of that fact in the author's notes.
I was planning on reading Lamia, now I'm definitely going to have to make some time, because that is one of my favorite songs. I've even tossed around the idea of writing something for it, though I haven't been able to come up with anything yet.