Cool idea. I'm a diehard Washington Wizards fan (sad, I know) and tend to unfollow a lot of players in favor of reports/beat writers/bloggers. The tweets are just more substantive for basketball junkies. A couple of random thoughts:

1) Remove the directed tweets -- i.e. "@user blah blah blah"

2) Beat writers/bloggers act as a filter and tend to retweet interesting player tweets anyway

3) It'd be awesome to see a real-time, in-game twitter dashboard like how you're displaying things now, but with those bloggers/reporters. It can be hard to keep track of it all on a single-line twitter feed... maybe a tweet that gets a lot of "action" somehow (retweets, replies, not sure how you'd measure it) could be displayed more prominently.