Movable Type 4.0 is most developer-friendly release of the Movable Type platform to date. We have devoted countless hours creating some of the best developer documentation Six Apart has ever produced, and even harder trying to build into Movable Type the interfaces and APIs that make building a plugin on top of Movable Type as quick and easy as possible.

One of those features is Movable Type's extensible OpenID authentication framework. Granted Movable Type will support any user wishing to authenticate via any valid OpenID provider, but in acknowledgment of the fact that OpenID is not widely understood by the masses, we wanted to provide a framework that would allow users to give a customized login experiences for specific OpenID providers, like our own Vox and LiveJournal.

Six Apart, the company I work for and the inventors of OpenID, were thrilled when Wordpress announced that it would support the OpenID protocol. Their support means our products can work more closely together and our communities can share in more meaningful and secure ways. To illustrate, I wrote a plugin for Movable Type that gives a customized login experience for Wordpress users wishing to leave comments on Movable Type blogs - all via OpenID.

Enjoy.