This is an interesting read on business leaders looking at and/or into social media - of which blogging is one of the tools. You need to have some of the information mentioned in this article as well as a plan if you are going to approach someone in your company to have a company blog, one that is public (not just internal).
One thought is that we are now very social in our connections and use of these tools be it blogging/Twitter/Facebook or any one of the others. As the article may elude; to this is the way it is and we are not going back no matter what the nay sayers claim. Look around the conversation is everywhere.
SmartBrief stats: How business leaders view social media | SmartBlog On Social Media