A recent patent filing by Sony has shed light on a range of possibilities and add-on peripherals for the upcoming PS3 motion controller.  Kotaku got a hold of the patent filing and accompanying diagrams.  The documents make no reference to PS3 but showcase a device with form factor identical to the console s planned motion controller.  Among methods and apparatus patented by Sony for the device is the ability to join two controllers together in various ways, representing different setups for different types of games, as well as attach add-ons.  Diagrams of the add-ons include drawings for a flashlight, a baseball bat, a maraca, and a microphone.  Kotaku says the filing also includes a proposed biometric reader to identify fingerprints.

Read more, and check out diagrams from the patent filing, at Kotaku.