It's not a one-browser web anymore. You need to reach audiences that use cell phones, PDAs, game consoles, or other "alternative" browsers, as well as users with disabilities. Legal requirements for assistive technologies as well as a wide array of new browsing experiences means you need to concentrate on semantics, alternate access paths, and progressive enhancement.  Give your audience the power to interact with your content on their own terms. It's the right thing to do, and with a $100
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