I love all the sites on this post. There is a diffrence between websites built for art and websites built for commmerce. There is no reason these sites need to be indexed well or valid CSS, they are not trying to monetize the user, or get top placement in google. Most are just experiments in new ways to visualize and display information. As flash and other methods become more advanced we will be able to use more navigation techniques like these while giving up less as far as SEO. New ideas like this help us rethink how people interact with the internet and ultimatley lead to innovation. Art is about breaking the rules. These sites are art.
