Bandwidth, Bandwidth....
You've created the perfect site, it's elegant, it's slick, it has more bells and buzzers on it than the USS Enterprise....it's got Flash,Swish,Swoosh,Smash,Crash (you get the picture)....but will the index page load in under 20 seconds on a 33.6k connection?...if it doesn't you may wish to rethink it... More....