We're in the process of implementing the Disqus comment framework, it allows greater functionality and usability than the default Wordpress system. For example now you can login using your Facebook credentials when leaving a comment!
However there will be some growing pains, we're in the process of importing all existing comments into the new system - so old comments may disappear temporarily. Please hang in there.
Update: Comment import seems to be complete. So we're going to see how this comment system runs, please feel free to leave feedback.