Some people get hooked on shopping, others online poker. I'm hooked on vocab. It's geeky to be sure, but I'm happy to come clean about that. John Breen developed a simple game, FreeRice , that promotes vocabulary and along the way generates funds for the United Nations World Food Program (WFP). Since its inception on October 7, 2007, FreeRice, advertisers, the UNWFP and people like you who use the net have together generated 9,123,269,430 grains of free rice. He's created a good, simple user experience. He's directing it towards doing good. It's awesome. NPR has the backstory today.