Greetings Globaloria Educators!
In addition to being sure you and your students have all the blogs in your classroom added to your blogrolls (see Ingrida's blog for a great example), I want to remind you to search the internet for blogs that you may want you and your students to follow to add to your blog as well.
"Cogs for Blogs" is a blog written by an educator who uses Web 2.0 tools in his classroom. He updates with links and tutorials to enhance his and his students' blogs. Better yet, from finding his blog, I was led to a Wiki he has created called Web 2.0: Cool Tools for Schools with amazing tips for enhancing classroom Wikis.
Below is an example of one Blog feature "Cogs for Blogs" brought to my attention called VoiceThread. Check out what I made below! I'm sure you can all think of great ways to leverage this tool in your classroom.
(If you can't see/hear the VoiceThread below, go here)