Veteran gamers like me knows what that Konami code I'm referring right? For the much younger generation who doesn't have the slightest idea what is the code, refer to the picture below:
Now why the hell am I telling you this code now? Facebook and Plurk recently embedded these codes on their website for some easter eggs. Try it to find out
You can see the official list of sites that have the codes at KonamiCodeSites.com which you need the code to access. uber geekness.