Blogging is the extension of a company marketing department or a public relations department.
There certainly is a need for a dedicated resource to mange not only the company blog, but the whole plethora of the social media sites and online networks.

How to structure and organise your company blogging?

Create a new position. Call it a ‘Chief Blogger’ or however your companies position titles are structured. Do not make it report to the Marketing manager, but to the same head where the Marketing Manager is reporting. Allocate a percentage of your marketing budget to the Blogging Department.

What should a Chief Blogger do?

Company Business Blog
The first step into the blogging world is to create a company blog under the company domain. Structure your blog based on the type and amount of the content you intend to publish, and the participation (content contribution in the form of comments, etc) you are looking for. Publish your initial ‘static’ articles about your company, services or products. Start blogging!

Social Networking
Search for the blogs related to yours. Leave comments, contribute in discussions. Develop the ‘Trust’ and the feeling of the ‘Authority’, associated with you and your company name. Trust and respect will help you bring visitors to your blog. Some of those visitors are partners and some your future clients! The sales process is far shorter if they see you as an authority in your industry!

Matt Cuts is a good example of a Business Blogging for Google: http://www.mattcutts.com/blog/