You've been hearing a lot about it in the news, and you're only going to hear more and more. If your business isn't looking into twitter, you're missing a boat thats growing massively - http://xlnk.me/16.
There are ways you can take advantage of twitter, the great thing about twitter is that you dont have to have a long spiel about what you've been doing. This, and other "blogs" i've done do take time, and a real concerted effort to do. Twitter "tweets" are a lot more casual.