Free Rice!!!
I don't know if anybody else has heard of www.freerice.com, but it is a web site with a good cause. the site contains a word game where the site gives you a word, and you have to pick the word's meaning. for every word you get right, the site's advertisers donate 20 grains of rice to a needy country. it's super fun, and you don't feel quite so bad for playing a game on the computer all day.