Have iPhone, download lightsabre app. It's almost a pre-requisite for iPhone owners. From next month you'll need a new sabre app though - the Bluetooth-enabled Lightsaber Duel which pairs with other iPhone users for proper duelling sessions.
THQ Wireless has even included 11 new Star Wars characters whose lightsabres you can use! Download it you must, Jedi. [Mobile-Ent]