For those of you interested, here's what I found:

I came home and immediately uninstalled Kazaa. It of course left behind all kinds of files. While scanning the registry, I came across numerous entries for Brilliant Digital Entertainment. They all point to a directory under Windows. In my case, it was C:\WINNT\BDE. Inside were numerous things, including a bdeviewer and bdeclean. bdeviewer looks to be some kind of media player. bdeclean seems to remove everything from the computer, directory wise (thank god). But, the registry still needs to be cleaned of any references to Brilliant Digital Entertainment.

Ahh, what fun.