There is a big media buzz over Twitter right now. In fact, not only individuals are using it as a microblogging platform, but companies are using it to stay in touch with customers and as a form of customer service.
To find out more, read this article as it goes into more detail as to how companies are watching you on Twitter.
Also, this is an excellent resource with companies that are currently using Twitter. I just want to figure out how you can have more than one person access a Twitter account.