Articles on blogging as an educational tool:

• http://coe.sdsu.edu/eet/articles/bloggingtech/index.htm
• http://www.edweek.org/ew/articles/2007/05/02/35blogs.h26.html

Some student blog sites:

• http://www.classblogmeister.com/
• http://learnerblogs.org
• http://www.21classes.com

Examples of student blogs:

(See Real District Blogging Examples)

Examples of educator blogs:

• For parent/student information
  http://www.mabryonline.org/blogs/
• For administration
  http://ghsprincipal.edublogs.org/
• For professional development:
  http://speedofcreativity.org
  http://www.davidwarlick.com/2cents
  http://www.dangerouslyirrelevant.com
  http://www.readwriteweb.com

My favorite site for setting up teacher blogs: http://www.edublogs.org