TwoFiveSix is a website that uses a Shockwave file to translate any other website into music � la Schoenberg. It's pretty cool, and very worth checking out.
Another classic site is the home of the Silophone, which is an abandoned grain silo in Montreal which has exceptional acoustic properties, and therefore has been transformed into an Internet-wired, interactive musical instrument. You can upload your sounds to the Silophone site and then play them through the Silophone!
I wonder if there is a way to merge the Silophone with TwoFiveSix. Hmmmmm...!