This spiffy new forum is running on Discourse, which is an open source forum platform I found a few months back. Here’s the address: http://discourse.org.
I’ve thought it might be interesting to experiment also with the “Minimal Discourse” CSS/JS edits, since every time I’ve shown these forums to someone, they tell me how confusing it is. So I’ve enabled them- you can see the before/after in the discussion below. Basically a lot of stats and random avatars get disabled.