Last year my third and fourth grade students had the opportunity to try blogging for the first time. The students didn't necessarily enjoy writing their own blogs, but they definitely enjoyed reading the blogs that the other students posted. They did have the chance to respond to each other's post. Students wanted to "chat" with each other instead of reponding to the content and focusing on the topic at hand. Also, one complaint that I have with blogs is that there is not the possibility of creating "threads" for students to respond to each other.