The Australian ABC TV network broadcasts a show every Wednesday night called "New Inventors: where inventors show all sorts of amazing things. About a month ago, one of the items was a case which doubled as a packing case for a digital piano keyboard. When it was opened up, the case gave an excellent impression of a concert grand piano. It was light enough to be manouvred by a rather slightly built lady and would fit (when in 'case' mode) into the back of a Honda station wagon.

I can't remember the name but the ABC website lists all the programs and there are message boards you could use to track it down if you thought it worthwhile.

Cheers, Rowan