For years an item that has been overlooked by many US web developers is "508 Compliance". US Federal law requires certain classes of websites to meet Section 508 standards. Failing to do so can place a site at risk of litigation.
Fortunately you don't have to become a Section 508 guru in order to know whether your site is compliant. A number of tools -- and one free online service in particular -- will quickly tell you what you need to know...
