Elias Pampalk has posted a
list of theses and dissertations related to Music Information Retrieval. There are a few on the list that I haven't read yet. I'm especially interested in reading Tristan Jehan's "
Creating Music By Listening" and "
Learning the Meaning of Music" by Brian Whitman. Brian and Tristan are the founders of
The Echo Nest - a stealth-mode music discovery company.