Bloggers invest a lot of time and effort in their blogs to produce content on a designated topic for an audience on a regular basis. Since writing isn’t easy, what drives them and how do they track their progress? Technorati’s 2011 State of the Blogsphere provides insights into these highly personal, social media content vehicles. Included are profiles of the 4 types of bloggers, their 5 salient attributes and how they track their results (aka blogging metrics.) Chart included.