The web site is amazing. Lots of Flash, very intelligently done. If you go to the Family Tree section (middle part of the diagonal artifact), you'll see the bit that impressed me the most. It's so cool. The bits of the Flash that involve scrolling suck ass from Mozilla, but such is life.
I wonder whether Flash's downfall will be how incredibly unreliable it is. For all HTML's hassles, you can make relatively elegant-looking immobile sites (unlike Flash's frenetic sites) that work on all systems. I guess Flash is programming, and everything that involves programming is destined to be a buggy hell. Not that I'm cynical.
Then again, maybe all that has to happen is that Flash look pretty on Internet Explorer running on Windows. I think I am definitely too cynical.