ContraI tried this and it worked for me.  You can’t have played “Contra” for the original Nintendo system without having tapped this code in dozens of times. Now, you can do it in Google Reader, too!  Crazy.
‘Konami Code’ Appears in Google Reader | Game | Life from Wired.com

By typing the code, sans the NES’ occasional “Start” and “Select” additions, (up, up, down, down, left, right, left, right, B, A) at the initial Google Reader screen a shrugging ninja pops up in the left-hand sidebar, as if to say … something. Honestly it’s a bit of a baffling easter egg.