Maybe non-anonymous is better.
I don't mean to flame, but seriously, online relationships are such a hassle. I've been in one, and the only good thing I can say about the whole ordeal is that atleast the sex life doesn't get into a lull. Every time you meet the tension is there.
You can never get a good view of what a person is like IRL when you chat online. Sure, you might get a good glimpse. Sometimes they end up being nicer than you ever thought possible, but more often it ends up being really awkward.
IRC or IM is not a good way of picking people up.