Being able to see how Google works their magic is pretty cool.

http://www.youtube.com/watch?v=MmUiKaHWjLI

At 5:28 Mark says:

"This is a big part of the encyclopedia and the guide. It is not just having a reference section but having a series of how-to articles and larger case studies. And those articles are primarily based around previously unreleased Google code that we are open sourcing as part of this project. We have a JavaScript library that handles a lot of cross browser compatibility issues which we use in properties like Gmail. If you ever viewed source you've seen the compiled version which isn't terrible readable. As part of this encyclopedia project, we are releasing the original uncompiled version that has the actual comments and real function names and description of things. So that is all open sourced under a OSI approved license."

This is so unbelievably cool, why aren't Google or other blogs playing this up more??