Apple just published firmware 2.2 beta 1 for developers. It is accompanied by a new beta of the iPhone SDK (build 9M2611). There are not much news about new features and improvements... but iphoneatlas already published a screenshot of new Safari interface, that is in firmware 2.2:

The new MobileSafari doesn't have the magnifying glass and refresh buttons at the top of the screen. There are the URL bar and search fields side-by-side instead. It looks much like the desktop version. Page refreshes are now accomplished via a tiny icon located inside the URL bar.

via iphoneatlas