Via Slashdot: Waste, released by the guys that do Winamp, is “a secure, distributed mesh-like networking protocal and platform.” What can it do? “This v1.0 beta release uses RSA (key based) and Blowfish encryption for security, and features Instant Messanging and group chat, along with file browsing, searching, and transfer.”
It’s GPL, it’s out there. I wasn’t able to get a network connection, but the installation process and key generation process was painless. We love you, Nullsoft!