I use this blog site in my classroom on a regular basis. I have enjoyed great success with this site. The simple format allows students to use this site with ease. They comment for themselves, and others can view their journals, but don't need to respond (like a discussion group environment). The use of this site has helped generate a buzz about reading and writing that I have rarely experienced in the classroom.
The site is simple and straight forward, yet students can design their own blog sites to suit their tastes. The site is easy to regulate and navigate.