Tylo,
i may be dumb and design illiterate but the way you slice the images is crazy....i can imagine the surfer on 33.6 modem waiting 3 minutes for all the small squares to load
you'd better map your image with bigger slices made of progressive jpeg otherwise a good 40% of surfers will never wait for the "free tour" or "join" button to load...as they are generally placed at the bottom and the slices start to load from the top.
just my opinion