How might a blog support the work you do? How might you use a blog with students? How might they respond to a blog assignment? What concerns do you have about educational blogging?
I think I would use a blog most for reteaching by posting instructional videos.  I can also see using it for general news and homework posts.  That would keep parents and students updated regularly and take out the guess work.  When it comes to students responding, I would probably use more logical reasoning and/or problem solving type scenarios.  I am concerned about the monitoring of student responses, but through awareness and teaching the behavior I would hope it would eliminate most of those concerns.