iPhone arrives on June 29 and since it syncs with your Mac just like an iPod, you'll be able to use Spanning Sync to keep your iPhone, iCal, and Google Calendar in sync.
Enter new calendar events or update existing events directly in your iPhone calendar, iCal, or Google Calendar, then sync with your Mac, and your changes will appear in all three applications.
Never again will you have to scribble down a note about a future appointment and try to remember to enter into your calendar when you get back to your Mac—just enter it directly in your iPhone calendar. The next time you sync it will be created in iCal and Google Calendar.
And since the iPhone calendar is integrated with other features like call dialing and maps, you won't have to type addresses or phone numbers from your events.
Like you, we're counting the days to June 29. Once we've bought and set up our iPhones we'll be posting videos and photos showing how Spanning Sync makes iPhone even more useful—and more Googley—than it already is.