I always love to imagine having the kind of sponsorship dollars that some brands get to play with, case in point, my favourite carbonated beverage - Coke Zero.  They have poured in some serious dough to maximise their sponsorship of the NCAA basketball "March Madness" tournament.  Spend a few moments to check out their extremely interactive website with lots of games and a very cool interactive bracket for the game.  To make it even more fun, they've now launched a new campaign looking for amazing sports fanatics, with four people winning the chance to blog every game in San Antonio, with the pay out of a trip to the semi-finals for all of their blogging efforts.  This is a great example of a combination of smart and fun games on a microsite for some online engagement combined with some offline fun (connected to the online world) that is just fun to tell people about.  Go Coke!