Great tutorial, very helpful for newbies who I have seen having trouble understanding the difference between signing a message and signing a post.
Can you make one for 'How to get a PGP Key', as well?
If you use GNU/Linux,
this is easy guide. If Windows, use gpg4win. Just follow the instructions from gpg4win, and you're all set.
(Make sure not to use SHA-1 while creating!)