Thank you for writing this wonderful article Nicole. Personally, I think everyone should be concerned about accessibility even without the ADA-compliance aspect.
There's a great add-in for Microsoft Office products called FireEyes by Deque (
http://www.deque.com/deque-fireeyes). The add-ins allow users to check accessibility issues while they're still in the development phases. Since it's an add-in, you can test it before it actually gets published to a live website.