How to Get Flashed by Google
The basic premise is, always show the search engines the exact same thing as you're showing your users. So you might get in trouble if you're hiding a bunch of keyword-rich content in an invisible div and that text is completely different than what shows up in your flash content. Best practice is to use Flash sparingly and support it with good, solid, on-page (visible) content for the search engines to chew on.

