Out of the closest iPhone lover Paul Thurrott of the Supersite for Windows got his beige-boxy hands on pre-release version of the iPhone 2.0 software update and the pre-requisite iTunes 7.7 software, and ran the upgrade process through its paces.
[Installing the 2.0 upgrade] is a multi-step and time-consuming process but is largely hands-off. [...] There's a new App Store icon on the home screen, for example, and the Mail application includes prominent links to Microsoft Exchange and MobileMe account types. [...] The old iPod Games entry in the Source list [of iTunes 7.7] has changed to App Store, for example, though selecting it now, before the July 11 launch, displays only whatever iPod Games you've purchased. [...] I'll have a lot more to say about this impressive upgrade in the weeks ahead. So far, so good.