Look, you play games, you know what the Konami code is.  Almost every Konami game and plenty of other ones have the classic cheat code which originated during the testing of Gradius. Most people know that if you get a game, it's probably worth punching in "up up down down left right left right B A Start" to see if it'll have any effect. What some people don't know is that many websites feature the same thing. The keyboard has no "Start" button, so you're going to have use your Enter button instead. If this is all news to you, you've probably never played Contra. You need to fix that. When you're done fixing that, hammer in the code to these links:

If you want to be reminded of the sounds most associated with the code, enter it on: Lee Cat

Ding Dong Ding Dong? Bo, be do be do:Ect-Ua

Active media knows exactly what you gotta do first: Active Media

Jack Black has actualy managed to be funny once. Or at least, was involved in funny somehow. Find out on:Converge

Remember the oldest joke on the internet? Geek Hype does. Koanmi Code it:
Geek Hype

Want to get excited for the Ninth installment of classic fatalistic action? Punch the Konami Code in to:Music Roamer

Which Marvel character is most likely to know the Konami code? You're right and if you enter it on Marvel's site, you'll see they agree with you: Marvel

Enter the code into Edam and you'll be hit with a facefull of retro awesome:Edam

If you're familiar with Congressman Gregory Meeks then you'll know how great it is to draw on his face. Well, I assume you will:Mango12

If you remember Simpsons Cartoon Studio (I wish I had some of my movies on a floppy somewhere) then you'll regonise this (may have to enter code three times):
Open Ended Adventure

Looking for a complete conversion? This site has your back:Sakana Comic

If you find the next site too serious, the Konami Code will spice it up: Taartern Vekeman

And finally, here is by far the best...pure genius:Your Mapper