Just read a cool post about Twitter marketing techniques including some recommended methods to properly post for the best response.
If you are still on the fence about using Twitter, then consider this. New web 2.0 marketing is most effective when your potential customers build a relationship with you. Twitter allows you multiple ways to get your message out and build those relationships.
You can use Twitter plugins to automatically update your blog or Twitter page. You can also add the Twittervision plugin to your Facebook profile page resulting in greater exposure to your Tweets and of course your message.
Learn more about Twitter marketing techniques and the best way to post at:
How to Integrate Twitter into Your Online Marketing Strategy