Hi -
Here's a brackets program I found on Google; it might either do what you want, or give you ideas for how to do it yourself:
http://sourceforge.net/projects/bracket-tracker/
It sounds like maybe you don't need an entire tournament program: maybe you just want to graph the brackets part of the tournament data.
But however much or how little you wanted to do ... you're probably going to have to find - or write - a program to do it.
The first two questions there would be:
1. Standalone application, or web based?
2. Which language do you prefer?
'Hope that helps .. PSM