The Nov 19, 91 MacWeek, page 38, has an article announcing the GyroPoint, a 6D mouse using gyroscopes. The weak article doesn't explain if the gyroscopes are optical or mechanical, though there's an ambiguous mention of an "optical scensing surface". The mouse weights 5 OZs and plugs into Apple's Desktop Bus and IBM PC's. Available "early next year" (probably means Nov instead of Dec 92 :-) Developer's version is $1K. The address is: GYRATION Inc. 12930 Saratoga Avenue Building C Saratoga, CA 95070 phone: (408) 255-3016