Apple released iCal today. I'm a bit disappointed that they didn't release iSync yet, I'm much more interested in it than iCal. I don't really use the calendar portion of Palm Desktop currently so iCal doesn't seem that exciting. The sharing aspect does make it a bit more interesting though. Apple has library of calendars you can synch with so you can have sports schedules or dvd release dates or holidays automatically displayed on your own iCal.
I may find it useful since I can subscribe to the Duke Basketball schedule and know when it's safe to call home.