Decided to try Mobile Me. I told it to sync my calendar. Now I have duplicate entries for almost everything in iCal on my Macbook. Also, the colors assigned to the different calendars ("Work" and "Home") are different between iCal and MobileMe. For example, I had an appointment in iCal on my "Home" calendar, which was blue. After joining MobileMe, I now have a duplicate entry, from the MobileMe calendar, but it is Green. This is very frustrating, I expected it to be a bit more robust.