I'm looking for ideas that might be useful as I start using blogs in my classroom.  I'd love to find out how teachers have used blogs with students, tips that have been learned along the way, and cautions that might help me use this successfully.  


One thing I like is the list of rules for student comments that is posted at http://comments4kids.blogspot.com/.  I think this would help establish a set of expectations and maybe prevent students from publishing inappropriate materials.