I personally hate Entourage 2004 and 2008, but my office makes use of an Exchange Server for calendaring. Having seen the announcement about ActiveSync coming in the 2.0 firmware, I thought this might be a potential solution. Set the iPhone up to sync Calendar and Contacts with Exchange Server, and then set up Leopard to sync the iPhone contacts and calendar with iCal and Address Book. That way I get the best of both worlds - over the air calendar syncing, and the benefit of iCal and Address Book instead of Entourage on the desktop... Does anyone else think this is feasible?