I’ve just released Vellum 1.0a4, which has all new commenty goodness, among other things. It’s all a bit untested, as you might imagine (the ‘a’ stands for ‘alpha’), but the plugin thing seems to be working pretty well. There’s a new Audience plugin, which Pingback and Comments now use; it’s to provide a generic object type for ‘responses to your posts’, whether they’re on your weblog or someone else’s.
Maybe I can get Sarabian to upgrade now. :-)