SMK Corp just introduced a supposed world's first "Wireless Input Pen." Catchy. The prototype pen features a 3-axis accelerometer and Bluetooth allowing you to write to, and interact with a display at a distance of up to 10-meters. It works without any of that specially formatted paper required by most Bluetooth pens
-- just a bit of flittering the device about in mid-air. That is, until your arm gets tired and you question the whole point.