My college roommates, the day after I was diagnosed, found these wonderful, educational games about, as Wilford Brimley likes to call it, diabeetis.
*WARNING* These games can be offensive to some diabetics, so please do not follow these links if you feel that you may be offended by their content. I am only posting this out of good humor and boredom.
http://www.diabeetis.com/game.php
http://www.diabeetis.com/game2.php