"Tour Guide" blogs are the ones that give a glimpse into the company. Not unlike an actual physical plant tour, this type of blog gives a "behind the scenes" glimpse into the goings-on of the corporate machinery. Sometimes they cover current events at the organization, introduce the reader to some of the members of the company, or highlight particular products or items of note. All this talk of transparency for the customer? Tour guide blogs are a start.
"Tour Guide" example
Blogger: Noah Acres
Role: Director of Sales and Marketing
Blog Location: http://www.bigha.com/blog/index.php