Interesting, I wasn't aware that it had been placed under the Clojure organization at some point, but It will never likely become part of Clojure-contrib because some of Incanter's contributors have never signed the Clojure contributor's agreement.
David
I just pushed it up, but if you still get the error message you might need to delete the contents of ~/.m2/repository/incanter (at least that's what I had to do).
David