What game Mod would you like to see?

MSNBC of all places, posted a not-really-funny-at-all story about the mods to video games that they would like to see.  Ideas like: 'Sims 2: The death and taxes' mod or 'Katamari Damacy: The paper or plastic' mod were on their list.  Dull.  Fun question,
wrong audience.  So we figured we would pass the question on to you all — What Video Game Mod would you like to see?