so on digg today there has been a bunch of portal stuff. Most really cool, but if you have played the game it might make more sense.
This site is a viral marketing thing. It plays like a command prompt. And is pretty funny.
The application is pretty funny. And the notes are interesting as well.
then you can play the flash version which is pretty cool here.
Finally a guy found a recipe for cake, a reoccurring thing in the game.