Twitter and Sports
Twitter has almost become my one stop shop for news with CNNBrk (cnnbrk, how it did not get to 1mil subscribers before kutcher is another story), Techmeme (which is a sort of aggregation of tech posts). It is also my main communication platform. Outside of texting and email, Twitter has almost replaced my use of Windows Live Messenger and AIM. Twitter is now taking over for my inside knowledge about sports, specifically motorsports.
About 3 weeks ago, the American Le Mans Series held their annual 12 hrs of Sebring. The ALMS is a mix of prototype cars as well as consumer cars that are adapted to race (like Corvettes, Porsches, Ferrari, Vipers, Ford GTs, etc). This is one of the main tune-ups to the 24 hrs of Le Mans in June. But not having speed channel, and being a fan of racing, the Audi team (http://twitter.com/audiR15tdi) decided to create a twitter account to keep those who couldn't be there or be in front of a TV to keep up with the action. They discussed everything a race fan may like, lap times, pit strategies as well as information from the other team.
I think I see twitter being more of a hybrid news aggregation/messaging platform as it develops.