It's difficult to see how this can be fixed, even if you can add some user interaction such as swiping up to hide the address and bottom tool bar, as soon as anyone touches the bottom of the screen they'll pop right back again.
This is also a problem for mobile sites with navigation or banner ads at the bottom of the screen. It looks like we'll have to design everything to fit in a 640 x 744 (320 x 372) area to accommodate iPhone 4S with iOS 7 users now.
I saw some people on other forums saying Apple it trying to force people to make Apps for the App Store. Initially I thought that sounded like a crazy conspiracy theory, but the more I think about it the more I think it might be true.
(* I just had to quickly redesign several layouts for a "gamified" mobile advertising campaign, so I'm feeling pretty sore about the whole iOS 7 thing!)