This is a great idea!

To explain the history a bit: I originally wrote this site so that I could play with my friends, whose email addresses (and twitter accounts) I know. That's why there are no accounts on the site itself right now. (And as I've mentioned elsewhere, accounts starts to look more like other services I know, so I'm less excited about going that direction.)

The site has enough traffic these days that I could imagine a match-making service that didn't require an account; you just get in line and give a rough sense of how good you are, and when a match is found both players get an email (or twitter) and away they go.

Does this sound like a good feature? I think it would be easy to add!

I'd recommend giving a quick overview of the Kyu/Dan ranking system and then asking people in line to estimate their rank if they don't know it.

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

perhaps by having them play against gnugo a few times at varying levels?

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.

Absolutely!

yep, and do it via twitter: match making announcements via twitter.