Well, I do want to offer blogs myself; WordPressMU has such a fickle settings that annoy the crap out of me (forcing users to the "anti-www initiative" for starters)...
I'd like to offer at least something "small" (and with any luck, some "group based blog" options, where you can have a "blog group" (where a group of users can post to a blog) vs just "every user has their own blog that only they can post to")