I would like to present you my little project I have been working on for the last 2 years (well, not full-time, just when I had some time left on my hands, you get the point):
http://www.vault52.net (click on the link to enter the vault at the main page)
It’s not one of those fancy ‘hyper kinetic’ flash design sites, but rather a sort of game engine (like Myst), that uses flash for graphical presentation. It’s not finished yet, not at all, but I think it gives a pretty good idea of what it could become one day.
One word of advice: you need broadband (2x 700 kb download), a big monitor and a love for the post apocalyps