Ask HN: Who's using Clojure, and to do what?

Hello everyone,

I've seen a lot of articles on HN recently talking about Clojure. I had a quick look at a few pages (Wikipedia, etc...), and I can't help but think that it sounds like the new cool language, pretty much like Ruby in 2007.

But to get a better idea, I'd like to hear the feedback from the community: Who is using Clojure (in real-life cases), and what are you doing with it?

Bonus points if you can tell what specific features made it a better language for the task.