See Sussman&#x27;s talk at Strange Loop 2011: &quot;We Really Don&#x27;t Know How To Compute!&quot; (<a href="http:&#x2F;&#x2F;www.infoq.com&#x2F;presentations&#x2F;We-Really-Dont-Know-How-To-Compute" rel="nofollow">http:&#x2F;&#x2F;www.infoq.com&#x2F;presentations&#x2F;We-Really-Dont-Know-How-T...</a>)<p>Thomas Kristensen is working on implementing the propagator in Clojure (<a href="https:&#x2F;&#x2F;github.com&#x2F;tgk&#x2F;propaganda" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;tgk&#x2F;propaganda</a>) -- you can see his ClojureConj talk here: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=JXOOO9MLvhs" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=JXOOO9MLvhs</a>