The Konami Code (up up down down left right left right B A ENTER) was often times used for cheats for games made by the company. Konami used this code for games such as Contra, Castlevania, TMNT, DDR etc. This code has been used in various pop culture forms.
Facebook used this same code to display a lens glare on the homepage. ESPN used it to have unicorns appear on their website. GameSpot.com uses the same code to redirect a user to the Contra for NES cheat codes page. And now it turns out that the Palm Pre is using it to enable Developer Mode on the phone.
Above is a demo video of the Konami Code being applied to the Pre. The device asks the user to Reset the Device to turn on Developer Mode Enabler. This is used to connect the Pre to a machine running the Mojo SDK for webOS.