I've seen lots of flash sites, But i think i've found the best one i've ever seen. purepulse.co.kr/ I can't post live links yet so just copy and paste it. They make templates and such for other people, so i might request one.
Navigation sucks in my resolution, but I like their design. I noticed that their site isn*t finished and was published online in year 2003. Their portfolio is almost empty. Best full flash site depends about what you like because with flash you can do anything you can imagine. you should check 2advancedstudio and see their website, also make sure you see their*s portfolio and see their bigest projects.
Holly molly macoroneeeee, 2advancestudio is one hell of a flash site, i changed my mind 2advancedstuio is the best i've seen.