
Daniel Levitin (author of This Is Your Brain on Music) has a fascinating site for his lab at McGill University. Including, but not limited to, his research, and video and audio news programs on Williams Syndrome, papers on Perfect Pitch, and an archive of all of the videos of the news coverage of his lab's work (great to use to introduce a friend to the deeper intricacies of music's effect on the human spirit.)
Be sure to check out the links page to take a look into other research in the field.