Businesses - Do you have a blogging policy?
If you do not, then I suggest reading Blogging consequences. Allot some time to do so, the post is not short. The article points out cases where a blog created liability on the grounds of defamation and cases where employees lost their jobs because of their blog posts.
(I also find it interesting that this blog, Quality System, comes to us from India, and is loaded with references to American law. Any sign of the world's flatness?)