I’m gonna play with RetroShare a bit.
RetroShare is a serverless, p2p based communications platform where every single piece of transferred data is encrypted. You find your contacts by their pgp key.
Here’s a link to the homepage.
If anyone wants to poke me on retroshare, my pgp key is on the public key servers with the key id 0x27BD763C.
RetroShare for openSUSE is on the build service.