Adobe Flash is a pain to the SEO community. Flash has never been indexed well by the search engines which reduces the amount of copy/images to work with. The best work around was to produce an HTML version of the Flash page so search engines could index all the awesome unique content that you produced. I work with a sketchbook site that uses Flash (against my wishes 
). As you can see there is very little on-page material for the search engines to work with.
The fight against the use of Flash is going to get a little harder. Adobe has announced that they are working with Google and Yahoo to make Flash and rich Internet application (RIA’s) files searchable. Google also announced that they have built a better “Flash indexing algorithm”. How well they index and exactly how much information can be pulled from Flash files is still to be seen.
On a side note, the Flash site I referenced above has released new, one-of-a-kind sketchbooks signed by the artist. If you know anyone that is into original art please forward the link.
Source: Adobe makes Flash Searchable - ReadWriteWeb
