You might find Strange Loop interesting. It's not a CL conference but rather a multi-technology conference on many leading edge technologies so you will find Clojure, Scala, Haskell, Erlang, Go, Ruby, Python, nosql, mobile, web, etc.

This year's keynotes are Rich Hickey, Gerald Sussman, Erik Meijer, and Allen Wirfs-Brock.

The conference is Sept 18-20th in St. Louis. Find out more here: http://thestrangeloop.com (full schedule to be posted soon)

I've found Lanyrd to usually be the best bet for finding conferences - unfortunately, they don't list any either.

http://lanyrd.com/topics/common-lisp/