Well, after having an explosion of comment spam on my account I've finally set it so that you have to register with TypeKey in order to make comments. I held out for as long as I could, but finally gave in. One hope I have now is that now that Six Apart owns LiveJournal maybe they'll find a way to let LiveJournal users register their accounts with TypeKey. Making it easier for them to leave comments on Movable Type based blogs.