Recommended mobile dimensions

I'm embarking on my first foray into mobile site design - I've set up a method to redirect mobile users to a separate URL, but now I need to design the mobile version of the site (targeting smart phones like Android / iPhone). What dimensions should I create this to? Is there a way to force mobile browsers to scale the content down? (Currently my site just appe开发者_如何学Goars very big within the mobile window and you must scroll horizontally and vertically to see it all).

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320 X 480 pixels is standard for mobile sites.

Things you ABSOLUTELY MUST KNOW about footers for mobile. iPhone has the bastard of all browsers and no emulator emultates it correctly for - specifically: CSS footer style - position:fixed; bottom:0; Don't even try it. iPhone only recognizes position:relative;

iPhones do not recoginized the position style of fixed - in case you want a footer to stay on teh bottom.