How to build an Ipad web app like GMAIL for the iPad

I'm interested in building am iPad web app like The GMAIL iPad web app. What is the best way to build it? What is the best framework? Jqtouch, webkit, etc.

Thanks

Solution

And here is a list of 18 other mobile frameworks with varying levels of complexity and usefulness. (I couldn't use 2 links in a single post)

http://iphoneized.com/2009/11/18-mobile-frameworks-development-tools-creating-iphone-apps/

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