Portals Magazine writes about business blogging:

Though the potential of blogs and aggregators is tremendous, these tools don't make sense for every organization, particularly those in which central control over content is a major concern. For now, they are best suited for companies or institutions where innovation is a goal and the serendipitous discovery of information is desired. Blogs and aggregators can also work well in situations where information needs to be distributed, commented upon, searched, and made easily available for later use; email, instant messaging, and standard Web sites do not allow for this combination of capabilities.

For businesses or divisions in which community building is an objective, such as developer networks, cross-functional collaboration teams, research groups, or customer user groups, blogging tools deliver ideal capabilities. By the same token, individual and group control must be acceptable, and even desired, for blogging to work in a corporate setting. In addition, the personal voice must be seen as a good thing, whether to form a more direct connection to customers or to allow for more meaningful discussions within the firewall.