Kurt, it doesn't take being a SuperNode to reveal your IP. As Eli notes, you need to have an IP address to do anything on a network. The data has to go *somewhere*. Anonymizing techniques vary, but somewhere someone still has to know the end user's IP, and wherever that information is known is where the RIAA will be sending their legal notices.

As for "downloaders" vs "uploaders" - as far as I can tell, it's sloppy journalism. They're suing the people who are sharing the files. Using the term "downloaders" is part of the fear campaign, no doubt.

There are lots of reasons to not use KaZaa aside from the lawsuit potential. Spyware, draconian EULA, most of the warez are trojaned, etc. Gnutella (ie limewire, bearshare, morpheus) or OpenNap (ie winmx, xnap) are much better choices.