Friendly distribution and management of PGP public keys via Facebook
The PGfb project started at InfoCamp Berkeley '11 to create a client side solution for encrypted communication on Facebook; at the WSJ Data Transparency hackathon (April 2012) it was continued as a project for PGP key distribution via Facebook profiles and other social networks.
Implement PGP encryption and decryption, and get it working in the Chrome Extension.
Save private key on the local machine (localStorage? direct to a file?). Send backup to the user as email, or just Copy+Paste.
Extension automatically highlights public key links visible on Facebook profiles.
The extension's own UI helps with submitting your public key to a keyserver.