Just released a minor update to growlbuildlistener. GrowlEcho now supports an optional sticky attribute to create “sticky” notifications. Also, GrowlListener looks for a build property called “gbl.endsticky” which, if set, will cause the Build Finished notification to be sticky.
Check it out:
http://growlbuildlistener.googlecode.com/files/growllistener-0.3.jar