My coverage of Garmin’s first GPS/PDA was pretty compulsive — I don’t usually cover GPS receivers, but PDAs are one of my other hobbies — so for consistency’s sake I should at least note two new models announced by Garmin this month: the $750 iQue M5, which runs Windows Mobile 2003 instead of Palm OS 5 (Brighthand, Palm Infocenter); and the $1,100 iQue 3600a, an aviation GPS that does run the Palm OS and has a yoke-mounting cradle (Brighthand, Palm Infocenter). Both are U.S.-only.