Surprising to some, we see a wide, and growing, diversity of screen resolutions from handsets (and soon tablets) running Android. This is in stark contrast to the iPhone/iPod/iPad world, with their fixed, uniform screen resolutions. It is crucial to take this into account when building for the mobile Web, requiring the use of appropriate HTML and CSS design techniques, as well dealing with portrait/landscape orientation changes. As Android devices continue to proliferate rapidly, in a host of form factors, the challenges here will continue to mount.