Have you noticed that some of the templates in Blogger have a short panel of icons for other social networking tools like Twitter and Facebook as well as email and Blogger itself? This allows you to tie together different methods of communication and collaborating. Try sharing a particularly interesting post to Facebook (or Twitter when we get to it a little later). Do you think this would be useful in a school setting?
Have you also noticed that some blogs appear to elicit more comments than others? What makes you want to read and contribute to a blog (your classmates' or others')? Have you commented on the blog of someone you don't know? How woud you feel if you got comments from non-classmates? How do you think your students would feel if they got comments from someone outside the school?
3 years ago