A page on the website of KPN (the biggest Dutch telecom provider, and former employer) suggests this.
At the moment, the iPhone is exclusively sold by T-Mobile, but for as long as the iPhone has been in the Netherlands, there have been rumors about other carriers.
A prank, a mistake, or somebodies wettest dream? I have no idea. All I know that the page is there (today), and that I saved it to make sure it stays 'there'.
A mirror of the 'analogue' pages can be found here.