There are guidelines to make sites easily accessible to people with disabilities.
This has been done by many site designers, and the WWW consortium has a specific page dedicated to it, here.
And no, the makers of the reader programs can not make the programs read any type of text we can see on a web site.
To be able to read the text in one of those flash banners that have an animation, the reader program would need to be able to have an accurate Optical
Character Recognition system and it would have to be fast enough to read the changing text.
Something that we can do easily for a scrolling text would be a nightmare for a reader program to read, even if it was capable of reading the image.





