And I say finally 
Not too much to ask for right? All I need is consistent emails and calendar events. SpanSync is a good solution but why pay when it is free? Don’t get me wrong here, I have signed up for MobileMe and am completely turned off by that service.
If you have a mac and you want your iPhone in sync rather than using gCal online (which is a good idea and a backup JIC), this is a viable solution indeed.
Google Calendar CalDAV support - Calendar Help Center.
Tags: gcal, google calendar, ical, iphone, sync