Killer Steampowered.com Fly Out Menu!

Okay, so I visited http://steampowered.com today for the first time and I was BLOWN away by how cool their fly-out menu is. I want to learn how to make something like this. Does anyone know of a good tutorial to get started with something like this?

Are you talking about the page turning? or what exactly?

Yes, I looked at the source code, but I'm not sure if they are powering this solely with CSS or if they are using Javascript as well.

Its almost all javascript. It looks like they're using CSS for a bit of the look and feel and the rest is JS. I assume Valve custom made that effect but there are plenty of plug-ins for the various JS libraries to do the same thing.

Here are a few for jQuery (my framework of choice) but you can find something similar for others as well.

http://builtbywill.com/code/booklet/
http://www.jpageflip.de/index_en.php
http://jpageflipper.codeplex.com/
http://blogs.sitepoint.com/2007/07/20/j ... ng-jquery/