overall, Google has issues with flash, and even though the newest version does have some accommodations for SEO, I would personally avoid Flash if you are seeking organic results. Something of interest, Bruce Clay, who is wildly considered one of the top SEO's online, uses flash in his navigation so that the search engines will NOT see his overall global navigation. He uses flash as part of his silo strategy, and keeps the links flowing to the subsections of his site very clean, using anchor text only. Hope that helps.