Whipped up a small little app for controlling a Compressor cluster node. It’ll let you start, stop, and reset Compressor and Qmaster. It goes a bit deeper than the system prefpane – actually stops the launchd process, kills any stray processes, etc. Reset will toss your cluster settings so that you can readd it to a new cluster, or recreate a cluster.
I’ve tested on a total of one machine so far, so who knows if it’ll blow up and murder you…