using blogs for student education

I am in class to get my Master's in Nursing Education. One of our assignments is to decide if we think blogs could be a useful teaching technique to students. Blogs are being used in some classrooms so students can work on them at any time. They can be used as a discussion page on a specfic topic,or as a journal. They can also add pictures or video clips according to my text book. One nursing instructor used a blog so the students could write about thier experinces in clinicals and share thier stories and frustrations and learning with the other students. An other article used it for faculty development for teaching tips. What do yo9u feel about using blogs as a classroom tool or have you already used blogs dflowersrn