[Nibbles]

This is a very interesting idea, I would use it if it were good. There are a few barriers to this, though:
The user interface is HUGE. When you are working with a limited amount of text space to send, every character counts. So what is important to some teams? How their favorite team is doing? This isn't something you could design quickly, this actually requires thought.
Also, how to actually send the messages is important. Many carriers offer an email interface, but the email from line (which I think you could leave out... have not tested actually) takes up quite a bit of your message, plus it is just obnoxious. And you would have no way to request information via text that way, you would have to use a web browser. I am not familiar how to send SMS messages directly from the Internet, I do not believe that is how the system works anyways.
First thing to consider: What data do people want?
The list I can come up with from experience is:
How their favorite team is doing; Upcoming matches; All match scores and who played (including more detailed statistics like, this years game as an example, laps made, balls hurdled, and most of all, penalties).
Different message formats could be put together as necessary, depending on the data wanted.
Yes, I automatically assumed SMS messages, not everyone has email on their phone. Emailed reports would be slightly simpler. But still a pain, and not as convenient.