Gyration keeps plugging away with its gyroscopic mouse system, and has done a version for PCs running Microsoft's Media Center version of XP, reports CNet. But I can't see the word "Bluetooth" anywhere. This seems strange because Microsoft's Wireless Optical Desktop for Bluetooth, launched last year, is the obvious way to go. (Obvious way to go for iMacs, too -- something similar should have been standard with at least one LampMac.)