[pragone]

You might also have good luck by analyzing the chat data from hockeystreams - just look for when a few dozen people write something along the lines of "GOOOOOOOOAAAAAAAALLLLLLLLLL", and take it from there.

Granted, not as much fun as setting up the whole system you did, but another option.

[DevoAKA]

HockeyStreams has an API for scores - for free. I'm not sure how quickly it updates though: https://www.hockeystreams.com/api#scoresapi

Highly recommended to anyone that have to deal with blackouts from GameCentre.

[yellingdog]

There's also a similar community on freenode at ##reddit-hockey we're a pretty reliable data source as well.