Visio is a natural choice for creating brackets for sports tournaments.
I have seen many elimination-tournament diagrams created in Visio over the years. In fact, just a few years ago, a very nice example was done for the 2006 World Cup. You can get it at Office Online here: 2006 World Cup Bracket.
But the trouble with these diagrams is that they require *gasp* manual input of data, or user-movement of shapes. The horror!
Well this year, that is all going to change…