Lots of music here; good selection. Unfortunately it's all RealMedia presentations. But the quality is decent.

Update: The links in the clip won't work, unless you're at Columbia. However, if you go to the original page, many of the links further down on the page will work. I didn't notice when clipping that some of the .rm files are protected, but many others aren't.

Would be nice if it weren't limited to people with Columbia University access.

That's weird ... I played a couple files with no problem. I guess some are protected and others aren't.