I want to get involved with Ubuntu and I've decided to join the Bug Squad. Launchpad tells me that I have to some OpenPGP Fingerprint key, and I followed instructions from this link:
All goes fine, I enter all the necessary information, and it starts generating the key.
I'm using an OS X machine, and I've noticed that in the process of setting up an automated backup a long time ago, I must have also installed a Mac implementation of OpenPGP (though I unfortunately don't remember which implementation it may have been).
That means that I now conveniently have a nice set of OpenPGP services available.