Onion Routing: "Onion Routing
The Onion Routing project researches, designs, builds, and analyzes anonymous communications systems. The focus is on systems for Internet-based connections that resist traffic analysis, eavesdropping, and other attacks both by outsiders (e.g. Internet routers) and insiders (Onion Routers themselves). Onion Routing prevents the transport medium from knowing who is communicating with whom -- the network knows only that communication is taking place. In addition, the content of the communication is hidden from eavesdroppers up to the point where the traffic leaves the OR network."
Been playing around with this since a friend pointed me back to it the other day (thanks Joel). A must use for browsing around sites that you may not want to know your identity. Will setup a hardened and malware resistant tor server here soon.
And since I don't want my tor server to be used to anonymously hack other systems, ingress/egress layer-7 screening will be used even if it upsets the cyber-anarchists out there.
-Bryan