Other than the directory-name issue highlight elsewhere, this plugin is pretty awesome.
So far, my primary complaint is that logging in with twitter creates a new wp account, even if the twitter account's email already is associated with a wp username -- all other login options (haven't tried windows live) actually do log in to an existing account if there's a match, which is awesome. But having twitter do so too would be even better.
So far, my primary feature request would be to allow sharing of comments to certain networks like fb and tw. Second would be adding LinkedIn auth.
All in all, I'm amazed that this works so well out of the box. Thanks so much.