In a constant search for achieving comment nirvana for the sites I manage, I was recently looking into integrating WordPress (and a couple of other CMS engines) with Facebook. The sites are setup to only allow authenticated users to comment and it just seemed like with all of the single-sign on technology out there that it just didn’t have to be so annoying. After installing the OpenID integration it seemed like there still had to be a better way to allow even more people to authentication. How about Facebook? Facebook has done a lot of work on making their API one of the best in the social networking world. The…