Nine Twitter tips for business | Business Center | Working Mac | Macworld
http://www.macworld.com/article/140254/2009/05/twitterdos.html

Here's how to strike the right balance when using this popular service to promote your business. (Hint: don't use it to spam everyone you know.)

James, I know how much you love Twitter. I think you should check this article out. It might give you more direction on how you should use your account.

A few neat tips on how businesses, not individuals, can use Twitter