Gez Lemon and Steve Faulkner have co-written an article about some improvements in the way later versions of the JAWS screen reader handles dynamic content updates and how this can be extended through the use of unobtrusive scripting.
Improving Ajax applications for JAWS users
The article focuses on the concept of virtual buffers used by some screen readers, in other words the means by which a screen reader user can interact with a web page using keyboard commands and how this works in dynamically updating pages. Useful code samples are also given
The article follows on from an earlier article which looks at Making screen readers work with AJAX.