Finished the first release of SSOPress, a JWT based single sign-on plugin for Wordpress. I did this mostly because I wanted something better and lighter weight than SAML 2.0 Single Sign-On or the other guy's single sign-on plugin. Also this should work fine in a multi server environment.
Another reason to do it was to just make another plugin. I have begun patterning my larger plugins very similar to the way Rails is laid out. I don't know if it's good, bad, or otherwise, but it keeps a logical consistency to code organization in Wordpress where sometimes there is none. This is the second time I've implemented a plugin like this and I must say after the initial structural overhead (which I would like to create a boilerplate for) it's definitely easy to use, in my opinion.