If we can make the effort to care about cross-browser compatibility then we can make the effort to care about cross-person compatibility.
That is one of the simplest, yet most effective points ever made about Accessibility in the realm of Web development. If you are in the least bit involved in any aspect of Web design or development, you should read What does Accessibility mean? It’s long, but well worth your time.
If you’re a believer, Jonathon provides a couple more rounds of ammunition, including a concise breakdown of the accessibility lawsuit (PDF) against Target.com. If you are unsure, or feel that accessibility isn’t important, you’ll learn a lot from his post.
This is important. I recently agreed to join the advisory board for AIR Interactive & Access U to lend my efforts to this extremely important cause. Every site on the Web should be accessible to all visitors. Yes, a balance must be struck, but right now the balance is tipped in the wrong direction. The effort to implement sites properly, ensuring everyone can access them is small.
Read the article. Think about how you work. Change what should be changed.