Debbie Weil has recently published The Corporate Bogging Book - Absolutely Everything You Need to Know to Get It Right.
Debbie covers all of the blogging basics - Why Businesses Should Blog, Tips for Writing an Effective Blog, Choosing the Right Platform and Sample Blogging Policies.
The book is a great tool for the entrepreneur or business that is considering jumping into the blogosphere. It will give you a jump start on the learning curve and help you avoid costly mistakes (see Dooced).
