Today Google released a new iPad app for accessing Gmail using iPad. The experimental two-pane user interface takes advantage of its large touchscreen and tablet form factor. Building upon the Gmail for mobile web app, this new interface displays your conversations on the left and your messages on the right hand side.
All the features of the Gmail web app that you’re used to, such as offline access and aggressive caching to reduce latency, are present in the iPad version. To try out Gmail out on the iPad, just go to gmail.com in Safari. The new interface is only available in US English for now