Want to see what your website looks like on the iPad? Get a load of iPad Peek, a new web-based emulator that shows you how any site renders on the new Apple device.
Click on the black frame above the browser to switch between landscape and portrait modes. You can also test your web forms by mouse-typing on the virtual virtual keyboard.
iPad Peek has a few limitations. There’s no touch scrolling, ads produce pop-ups, and embedded Flash videos and objects will still render inside the emulator even though the real iPad doesn’t do Flash. So, it’s basically a Webkit wrapper set to a fixed width and height. But, it does give you a pretty close approximation of how your site will look on the new shiny.
Also, Mashable has instructions for changing your Firefox user input string to that of the iPad:
Type “about:config” in the address bar, click the right mouse button, select New – String, and name it “general.useragent.override”. Then enter the value “Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.10″.