I created http://tweetyourbracket.com. Had the idea about 10 days ago, just finished it last night. There’s no OAuth involved, instead I’m watching Twitter for specific tweets and then parsing the tweet for a bracket code that is then saved into the user’s account. I decided on this because I wanted all pages to be open and to keep it simple. Anyone can go to anyone’s page and ‘fork’ their bracket and then tweet their own bracket.
Obviously this is super late since the brackets close in about 18 hours, but trying to get as many users as I can to see how things go. And then see what next year is like
Let me know if you enjoy it!