It's official. Four million people are now self-conscious in how they pronounce the word "Blue." Okay, maybe just the 500k in the Americas, but you get the point. Nintendo announced in a gloating press release today that the company has sold more than 4 million copies of Brain Age: Train Your Brain in Minutes a Day with Japan driving about 75% of those sales. What's your Brain Age? Or has this game made its way to the bottom of a drawer somewhere?