Official Google Webmaster Central Blog: Ring in the new year with accessible content: Website clinic for non-profits:
"Cross-posted on the Google Grants Blog
In our previous post, we did some source code housekeeping -- just in time for the holidays. But once users have landed on your site, how can you make sure they’ll know how to get around?
As it turns out, easily accessible content on your site can make a big difference. Users tend to have a better experience when a site helps them find and understand its content. Having an accessible site not only empowers users, it also helps search engines understand what your site is really about."