See How Your Website Looks on the iPad

The iPad user base will become big enough for web developers to start paying attention to how their websites look on the iPad.

iPad Peek is a nifty tool that lets you see how any website will be rendered on the iPad. Click on the top border to switch from landscape to portrait mode. The virtual keyboard and the buttons on the iPad browser are just for show, but the reload button works.

Previewing a website in iPad Peek doesn’t offer the “real” iPad experience, however; for example, Flash works (and it shouldn’t). 

To do this last bit in Firefox, follow the direction in the post  http://www.labnol.org/tech/ipad-user-agent-string/13230/