Microsoft Corp. today announced the full availability of Microsoft Kodu Game Lab for the PC and the launch of the nationwide Microsoft Kodu Cup 2011 competition. Kodu Cup invites students, ages 9 to 17, to design, build and submit their own video games using the Kodu Game Lab software — no previous programming experience necessary! Starting today, kids can enter the competition, read the Official Rules and learn more at http://koducup.us…