jquery pump effect

some new loader effect?
this is a small jquery plugin that renders something like a pump or glow effect by switching two css classes with jquery UI transitions in an endless loop.
the loop can be stopped by applying a stop class to the element.

watch the demo on this almost autogenerated github page:
Demo

Usage is like this:

 $('.status').pump({normal: 'normal',
                    pump: 'pumpup',
                    interval: 400,
                    stop: 'statusDone'});