Musician/blogger Mark Mosher is a big fan of the Percussa AudioCubes and has posted several articles at his site about the unique controllers.
He recently interviewed the inventor of the AudioCubes, Bert Schiettecatte, to get the story behind the devices, how they work and Schiettecatte’s views on the future of tangible interfaces.
See Mosher’s site (ModulateThis!) for more info about the interview and the Percussa site for details on the devices.