Accessibility, its the Law!
You might find this funny but making your website accessible by everyone is set out by law in a number of countries already (W3C Web Accessibility). If someone cannot access the content on your site they can sue you. If you are running a non-profit fan site you really can’t afford to be sued because your website is not accessible.
Although you can’t guarantee that your website will be accessible to everyone you should at least do your best to make sure it works for as many people as possible. The best way to do this is to test your site in a number of browsers (Internet Explorer, Firefox, Opera, etc) if you have one check your site on your mobile phone or PDA. If you have access to an Apple Mac check it out in Safari. The more browser you check it in the better your website will be.
Also remember to make sure all your images have an alt text or long description and where you can use text instead of images. Make sure you can proof read your content a few days after you have written it, or get someone else to read it. If they can’t read it what chance has someone using a screen reader got of understand your content?
There are a number of tutorials on Accessibility on ILoveJackDaniels.com. There many others as a quick search in Google will show.