I have recently found a new site called Keybase.io. This site dedicated to sharing your public PGP key. It also has some cool features like verifying your Facebook, Twitter, and other accounts by posting singings with your key. I would highly recommend everyone sign up, and start signing your items.
Check mine out. https://keybase.io/jfreier
Also if you need some help setting up your GPG key, checkout my wiki page to help.
http://wiki.johnfreier.com/index.php/Linux_gpg
Here is a link to my public key Click Here