There's a new Website dedicated to the fledgling Mattel HyperScan community: http://www.geocities.com/hyperscansoftware/
They just added forums and already there is talk of getting some projects under way. Check out Wikipedia for more info on this little seen recent CD game/card battling videogame system targeted at Tween boys from last year's holiday. I own a few systems and games from when they went on clearance, which was shortly after their introduction.