grokster who?

Rodi is a small-client P2P application, written in Java, that improves on BitTorrent by allowing both content searches and full anonymity. It's released under the General Public License (GNU).

Even your IP address can be hidden using Rodi through a process called 'bouncing.' That is, if A wants a file from B, they get C to agree to stand-in on the exchange. B gets C's IP address, not A's. Through IP Spoofing A can even hide their identity from C.

Rodi can also be used from behind corporate firewalls.