Yeah, this is an itch I've had for a few years and last year's summer leagues was the straw that slayed the dragon (is that how that phrase goes?). The youth market is definitely something on my radar as well. I've met with a few folks who've provided some invaluable information for tailoring to youth sports leagues and activities, and I have a few more meetings/conversations to have to hopefully score my first school contract.
As for Erlang, all my new projects are written with the Nitrogen Web Framework (http://www.nitrogenproject.com), and will be using bits and pieces of my little blogging engine/CMS, Yabbie, which will soon be an open source and hosted project of mine.
That said, the BracketPal software is not currently planned to be open source, at least not at this time. I do want to find a way to tailor the service to smaller ad-hoc-type leagues (like a group of friends who regularly play volleyball together, do a fantasy league together, or who want to run like a weekly gaming league amongst themselves).
