The question of the hour is how public to make classroom blogs and websites. Let's start with blogs. I've done just a little experimenting with them, only with my Justice and Peace classes. And only a few assignments have landed there; I have also been using Moodle and a wiki page. I know that some educators have said that students do better quality work when they are writing for more people than just the teacher. My students had only first name, last initial on the blog. Most entries showed thought and effort, though not all.
The blogs may as well have been private, because I didn't advertise them other than on Parent Night, but lately I got nervous about the whole thing and closed them off to students only. I was able to tell a concerned parent last night at conferences that her child's blog is open only to the class. She did not feel that "provisional thinking" should be on the internet for all to see. One could argue that putting that thinking out there (pretty much anonymously, by the way) gives a student a reason to think things through.
At least they still have their classmates as an audience.