While there are the usual nonsensical #hashtag trends as well as the occasional promoted topics, but for the most part, if it's one of the top trends on Twitter, it'll be the main headline on CNN.
Twitter has allowed anyone to express their opinions in 140 characters or less. I think the character limit is what makes Twitter very appealing to people. You don't have to write lengthy articles in a blog, and the complications of Facebook or Myspace don't come into play. Twitter is simple. You create an account and you post away, simple as that.
To be honest, I became aware of a lot of news items because of Twitter. Everything from the latest NBA trades to celebrity deaths (or hoax deaths), even the latest on the Middle Eastern protests, I've gotten from Twitter. I think it's a great resource and it's fun to use once you get familiar with all the features.
It's probably the most direct way to keep up to date with your favorite celebrities as well. I know some people say that they don't care what an actor ate for breakfast, but I've gotten free concert tickets from responding to a celebrity Tweet. Celebrities like Olivia Munn also keep close contact with their fans, usually inviting them to some event. Munn invited the first however-many followers to join her in ringing the closing bell of the New York Stock Exchange earlier today. I also mentioned in an earlier post how Twitter helped me launch a blog and get an endorsement from the owner of Liverpool Football Club.
I personally enjoy, like, and use Twitter regularly. I think it's an entertaining, and sometimes educational resource.