A list Apart comment in a April 2002 issue on some of the accessibility concerns of Flash MX. I revisit to look more closely at accessibility in Flash.
The two articles are written by Joe Clark and Andrew Kirkpatrick respectively and they look at conflicts in misunderstandings of WAI and Section 508 and create a roadmap for future improvements. The articles also have an excellent collection of discussions in the forums
Joe Clark is a Toronto USA based accessibility consultant and journalist. He has written a book in 2002 titled, Building Accessible Websites and the first 5 chapters are available online. His book blog can be found here and some reviews of his book can be found in Amazon here.