Ed Bott: "The biggest missing piece in the iPhone is its ability to sync calendars and e-mail effortlessly."
I also liked Bott's additional comment in the voluminous comments to his post: "That cool phone is not so cool when you miss an urgent notification of a change in a meeting because you weren't able to sync up your calendar or get an e-mail message pushed to your phone. That's how business works in 2007."
Let the drumbeats of discontent grow. You can bet calendar sync over Cingular's network was something Cingular would love to have provided, because it would have consumed so many uber-profitable data minutes. Certainly Cingular has other phones it would like to sell you if you need that essential feature. Maybe it's just a way to get more customers in the store?
(Note: Apple's "push" email through Yahoo! indicates the email situation may not be as bad as the calendaring. Thus Apple's guilty of the general crime of not treating calendaring as seriously as email, which is why so many of us still arrange our calendars via grossly inefficient email.)