Whoa. The Apple website looks completely different. Also, I went to the Apple store and searched for iPhone (naturally) and this is what the search returned:
iPhone, the revolutionary combination of a mobile phone, widescreen iPod, and Internet communications device, is coming to the online Apple Store and retail Apple Stores on
June 29, 2007, with AT&T as the exclusive U.S. carrier partner.
Therefore, the earliest you can order would be June 29, no preorders. I'm assuming that means at Midnight on the 28th, and then maybe they will be shipped out June 29 at 6PM? That would be some pretty quick processing time.