This little Bluetooth-enabled SportVue BT1 from Motion Research shows speed, RPM and selected gear info on its LED display, clipped onto your motorcycle helmet and positioned exactly where you need it. Looking at it with one eye, its data appear to be superimposed ahead.
It can also show you radar detector and caller ID info, and the company's also working on displaying GPS data such as altitude and heading. Expect to see the BT1 in time for Christmas for less than $200. Motion Research tells us turn-by-turn GPS navigation might be in the offing after the BT1's release.