It would be slick if it figured out their approximate Kyu/Dan from watching them play. Not sure how you'd do that.

Yeah. I'm starting to think that my site best serves people who are new to Go, or who are casual about it, and want to play some fun games without worrying too much about all the complexities. So having tutorials about the game, including this kind of information about Kyu/Dan (especially in the match-making section of the site) I think makes a lot of sense.

Thanks.