Via Chantblog, I found this webpage which takes Bach's Well-Tempered Klavier fugues and has an analysis and discussion for each. It uses Shockwave and I had to open it in Safari to get it to run properly but it is quite seriously shiny.
Over at Vimeo there is a video of Bobby McFerrin demonstrating "The Power of the Pentatonic Scale". As someone says in the comments, I'm not convinced this demonstrates a whole lot about the power or universality of the pentatonic scale per se but it made me grin from ear to ear. What a wonderful, physical demonstration of the way humans relate spatial distance to differences in pitch.
Thirdly, over at RockOm there is an article about music and saving the world. I think this should be required reading for music students.