Angry Birds? Small stuff. Instagram? Hipster fodder. Apparently the real mobile gaming sensation is Draw Something from startup OMGPOP!. The Pictionary-style Android and iOS game has racked up an incredible 50 million downloads in as many days across both platforms. At least 10 million (and probably a good bit more) come from the free Android version, and another 500,000 to a million have paid for the upgraded game. iTunes doesn't publish its app numbers, but Draw Something has consistently held the top spot among games there and in the Google Play Store.