It's only $50 to attend.
I'm particularly excited about hearing Nada Amin (who works on many neat things, included type related ones at EPFL - home of Scala) will be giving a really fun talk on nominal logic programming. Expect brain melting of the best kind!
Finally, going off topic just a bit, if there are any overly ambitious students looking at this thread - the Clojure community is putting together the list of project ideas for Google Summer of Code 2013 - http://dev.clojure.org/display/community/Project+Ideas. I'd like to see quite a few enhancements to core.logic! Of course we're equally excited about core.typed, ClojureScript, better tooling for beginners and more! Please, feel free to post your own ideas.