Flash movies can be programmed to redirect to a different URL based on an event. I made a very simple swf (no graphics) and embedded it in html and it worked like a charm. I'm pretty sure that spiders can't watch movies and would probably not be redirected as they would just read the page, users with the flash plug in would be redirected to the content you want to show them and those without flash would get a rather ugly SE optimized page. Does anyone see any "holes" with this method?