Good for SEO??? Search engines can't read the flash or javascript, then how it should be good for SEO... i always recommend to use flash for banners or intro etc... not for content....
Have you ever wonder why those of the best ranked sites on the Internet are made using Flash. Because their owners are no "SEO dependable", they got an idea and work for it according with their goals and own concepts and not with what Google and other search engines like or dislike. Of course it is not only matter of appealing design, frames, iframes, javascript and flash can be SEO friendly if you know how and apart of keywording work in promotion, paid placement, and more. Really, many people act like if their website were owned by Search Engines and act accordingly, away from their own original projects or cherished dreams.