Clearly oblivious to the disinterest storms Blu-ray and HD-DVD are kicking up around the world, Hitachi has been bravely working away on increasing the storage capacity of Sony's expensive blue discs. Perhaps a 100GB one will make people bothered about HD formats? The tireless Hitachi boffins have managed to squeeze 100GB of storage space on its new blank discs, by mashing four regular Blu-ray data layers...