http://www.batmanthehorse.com/jemplode/jemplode20.jar -- It supports starting/stopping a 1 second refresh of the screen ... I may make that speed adjustable at some point, but I just wanted to get a version out there for you ... The UI code isn't perfect, because the grabbing on/off state can get out of sync with the button, but it should be fine for now as long as you don't double-click it.

Mike