Ah yes, a silly mistake on my part. I am hoping that eventually Clojure will help the programmer write parallel algorithms, but you are correct in that such constructs don't exist in the language at this moment.
http://github.com/richhickey/clojure/blob/26f5aed73c9cc2959b...
http://paste.lisp.org/display/84027
It's coming,
Rich
Is there auto tree balancing?