Actually, there is a link to play the intro and another link which allow users to go straight to the forum. I haven't checked the script but if the Splash Screen stops at load if the user does not click "Play Intro" I don't see a problem even for 56Kers. There are also 4 forum links at the bottom for non-Flash users.
Like the others, kudos on the Flash and clean design. My only suggestion, which is small, is to close the gap between the navbar links. Only one row is needed and since you're using a fluid layout having the links closer to one another makes for an easier navigation. Again, good job.