Being Able
AskAlice is a service provided by Adobe to analyze the accessibility of your website. It's also to advertise their products, but, putting that aside for the moment, it's not a bad little service. It doesn't give as much detail as sites such as Bobby or Cynthia, but it will analyze a "randomized statistically significant sample" of your site, rather than just one page.
Update: I suppose I should have mentioned that I used this service on OKMensa. It got a score of 79 out of 100, and it appeared all my errors came from pages generated by PHP-Nuke. My goal for the next year is to convert most of that site to use Movable Type. It's my current hammer.
