I think it could be what is caled a Powerplate in Europe, Silverbirch (long time no see too!) have a look at www.powerplate.com
It is a vibrating platform that is supposed to do more, more inensely and in 1/3 of the time needed for the same results doing conventional exercise.
I have not used it, but heard that it has not had a lot of serious scientific backing, although it is widely used. My instructor did not like it, the vibrations were to static and uncomfortable for him. I would like to try it, if only to see what it's like