I’ve been using a Firefox extension called “Fangs”:http://www.standards-schmandards.com/fangs for testing the accessibility of some of the web pages I’m working on. It provides a visual representation of how a screen reader would render the page.
As well as the screen reader output, you also get a list of all the headings and links in the document.
For people new to accessibility and screen readers, I suggest you watch “Darren Fittler’s recent presentation”:http://www.webstock.org.nz/recordings.php at WebStock. His presentation was a huge eye-opener to both myself and many of the conference attendees. By devoting just a little effort to accessibility issues, we can make web browsing a whole lot easier to those with visual impairments. In addition, there is the added benefit of search engines being able to index your website more effectively.