I hope this is just a start. Flash offers so much, but I would bet that we are a long way from anything we do in Flash being given any relevance by the search engines. It would be too easy to create Flash pages and ads with text and links embedded inside that was never displayed.
While the search engines may have found a way to discredit text hidden that uses the same background color of the page, are the spiders reading Flash files smart enough to know that text in Flash is not necessarily ever shown on the screen? My guess is they are not yet, and for this and other reasons I doubt that anything in a Flash file will help much in the way of
SEO yet. But, every little bit helps and I will be sure and begin making sure that my Flash work takes full advantage of this capability.
I still won't suggest sites being built using just Flash, but it might change my mind on some things I do for my clients if text is readily spidered and
SEO friendly now.