How do people use blogs?

This is my first experience with Blogs, and I am curious to see how I can use the communication technology to help improve our library and eLearning services. I work in a university environment where we have to mange some aspects of learning and provide quality assured information resources; but we also have to empower learners to learn from peers and others, and we from them; and then there is the concept of 'a free for all'. Any asvice on how to structure questions to elicit good feeback would be very gratefully received.