Leak or no, this phone is most likely going to sell like hotcakes, and the builders at Apple should do just fine. It's not like the product launch is ruined in any way... Steve Jobs will be A-OK on stage presenting it.
Virtually any tech publication would report on an iPhone prototype, and it is not their moral duty not to.
(I don't think Gizmodo needed to name the Apple engineer who lost the phone; however, this is not a topic presented by the article.)