The new Facebook Application for the iPhone/Touch is here and in addition to the typical stream of bug fixes, you'll find better photo support, better wall interaction and support and a new user interface.
Of particular interest is the new invention of the sliding sub-tab.. the user can slide the horizontially-oriented sub tab items left or right making for an interesting new interface convention.
We'll see if this catches on.
Some say that the iPhone application development process has been a bit.. well.. unwieldy. Fortunately Wired's Webmonkey was able to articulate it through the majesty of Dipity. The timeline tracks Developer frustration from start (June 9, 2008) to present.
neat.

The iPhone's new 2.2 software update will be arriving shortly and at the top of the list of changes you'll find a new take on the Safari interface. The Google search bar placed below the address field will be gone, replaced by a 'closer-to-the-desktop' look and feel. There's a screen grab of the new UI after the break. Enjoy.