I just returned from Cooperstown All Star Village and I kept score with iScore while coaching first base each game. No one had an issue with it, in fact, every game, the umpires came up and wanted to see the app. As the previous poster mentioned, you have to fill out paperwork at the end of the game...

You can link your team's Facebook account a Twitter account so twitter posts will post to your Facebook status. We did it last year for our Regional Tournament run and it was great. Lots of family/friends could follow our games if they couldn't be there in person.