http://www.cnet.com/news/twitter-keeping-140-character-limit-on-tweets-after-all/
Ok, after this article, I've gotta say that this company's future is pretty dismal. Look, they can't just be a conduit for links and nothing else. If their primary service is only allowing people to post 140 characters, then there's no room for any substance in a tweet since a sizable chunk of the 140 characters is usually taken up by the destination URL that actually has real content on it.
Why would an advertiser want to expose themselves at a point of transition and not the final destination? The answer is that they don't. At least people actually submit posts, pictures, and videos to Facebook, which is real content that Facebook can sell ads against, ever how pointless the majority of that content is. A tweet with half of a sentence and a shortened URL is not content. The only hope they have is getting acquired. Sorry Twitter, but the glory days are over.