I've been happily using a Logitech Trackman Marble (USB) with my laptop for years, resting on the armchair of my recliner. Is there any type of trackball mouse (i.e., where the mouse itself remains stationary and only the track ball has to rotate to move the pointer) that will work with the Logitech Revue? I know the Revue box includes their "Unity" ("Unify" ?) wireless sensor but I don't see any Logitech track balls that will connect that way. I read in another post here that some wireless mice will work, although only partially, if the transmitter/receiver is plugged into a USB port on the Revue box but "partially" doesn't cut it, and frequently the range of wireless mice isn't enough either (need 8 to 10 feet).