Google has announced an optimized version of Gmail for the iPad. The new version includes a new interface taking advantage of the extra screen real estate the iPad has to offer.
"We're releasing an experimental user interface for the iPad built on the Gmail for mobile HTML5 web app that we launched last year for the iPhone and Android devices. Those devices have large screens compared to other phones, and tablets like the iPad give us even more room to innovate. To take advantage of the iPad's large display, we've created a two-pane view with your list of conversations on the left and messages to the right.
iPad users will be automatically presented with the new format when they navigate to gmail.com on the device."