A kindergarten teacher in Santa Monica uses Blogger to stay in touch with parents.
http://akinderblog.blogspot.com/
Here's an article from the North Carolina Teachers Network about blogging and teaching:
Pam Pritchard is mentoring an entry-year teacher and the two of them are blogging about the experience.
Entry Year Teacher / Mentor Blog:
And here is her classroom web site that she uses to share information with parents: Click here.
Here are some teacher or school blogs in action:
http://www.mrwrightsclass.com/
http://contner.weblogger.com/
Ohio edublogging
Butlerville School's web site is a blog with links to teacher web sites, including Miss Higginbothan's class, which is a weblog too. Good example of how to jazz up a page and keep it informative.
The Bay Area Writing Project uses a blog for their web site. And it's very stylish, too.
Love-productions.com: Graphics - Sets
BlogSkins.com Preview Skin: geranimals pink & purple
These are blogs that are about blogging and education. They often highlight teacher and school sites that are using blogging, as well as talk about the technical aspects of blogging.
Edublog News
http://educational.blogs.com/edbloggerpraxis/
Pat Delaney of Galileo High in SF