Filed under: InternetSteven Frank from Panic has outlined several important differences between the way that Address Book (on Snow Leopard) and Google Contacts manage data. This is on his personal website. He's quick to point out that it is not meant to be a comprehensive list, but it reflects several things that I also noticed.
A few months ago, I had the notion to replace my MobileMe subscription with syncing to Google services, using BusyCal (whose icon is shown here) for calendars and either BusySync