Have you been paying attention to Microsoft's failed bid for Yahoo -- and other events of 2008? Joseph Tartakoff put together a 10-question quiz to see if you're a Microsoft know-it-all. For your information, several questions have more than one answer. I've included one question to whet your appetite, but no cheating. For example: "In early February, Microsoft shocked Wall Street with an offer for Yahoo. How much was Microsoft's bid initially worth?" The answers are at the end of the quiz.