rangerer.at

I'm a great fan of the combination iPhone and Google Calendar. Its especially useful if you share calendars with your wife - like I do.

Setup is rather straightforward - although I use Google Mail instead of Exchange (suggested by Google) as the account type. That way I'm not able to sync contacts (which I don't need to), but everything else works better. The only difficult thing to figure out was how to activate multiple calendars for your iPhone:

Simply go to https://www.google.com/calendar/iphoneselect on your iPhone and select the calendars you want to sync. Some of your calenders (in my case public ones) might not be available, but at least you will get all private and shared ones.