the iSync w/c was included w/ leopard will sync your palmOS devices to your mac so you can use the updated & better iCal & address book apps instead of the 1 on palm desktop. well at least it worked on my treo 680 but i think it will too w/ others. no need for the pricey missing sync w/c also has expensive upgrade costs. i bought the ver. for WindowsMobile5 before. when an updated ver. of missing sync for WM6 was released, the upgrade fee they require costs the same as the 1 for the WM5 ver. what the?! upgrade costs should only be a fraction of the previous ver.'s price. but for missing sync its not. my point is everytime missing sync is updated they charge their customers a hefty amount. good thing iSync ver. 3.0 now works! try it! but pls do a backup 1st. mine worked well & sync-ing is fast, even for the initial sync. as of this moment, mark/space [the missing sync devs] havent released yet a non-beta ver. for leopard. there are only beta versions w/c dont quite work well, as per feedbacks on their forums. haha! im thinking of posting this same thread there. whatchathink guys?