Since MathJax was just released, the number of sites using MathJax is still small. However, with sponsors and supporters such as AMS and Elsevier, you know that some big sites will soon begin using MathJax. People have already developed modules to work with course management systems such as Moodle and blogs such as WordPress.
The release of MathJax is great news for accessibility on the web, but were not stopping there. We're busily at work on some more exciting developments related to MathJax, MathPlayer, and accessible math. If you haven't subscribed already to this blog, click on the link in the upper right hand corner to subscribe so you'll be the among the first to find out about what's next for accessible math.
Note: there is bug with MathJax and MathPlayer's zoom. We'll be releasing a fix for this soon.