I spotted this yesterday in the WordPress plugin repository, http://wordpress.org/extend/plugins/facebook/ the official Facebook WordPress plugin.
I’ve not had time to play with it properly but it looks like it takes over the comment management of your WordPress blog and replaces it with the Facebook comment system.
If you have a large community on Facebook it could be useful but if you have a web community who don’t use Facebook it may cause a few problems as the only commenting options I can see are Facebook, AOL, Yahoo & Hotmail.
I’ve also not found any way of keeping the archive comments on your site visible once you install it.
Has anyone used the plugin yet and if so what are your experiences?