Kazaa is another big peer to peer network much like morpheous. You'll also notice that they both look very much the same since the software is created b y the same company, I believe called Fastrack. A court in the Netherlands is in the process of shutting both of these sites down, much like Napster. I've also read that they may go after Fastrack, the software developer as a way of killing 2 birds with one stone.
Download while you can it may not last.
ic