Another interesting article that summarizes blogs and its advantages so well.
http://www.techlearning.com/db_area/archives/TL/2003/02/blogs.html
Particularly like this part:
Golub, who is also associate professor of English education at the University of South Florida, teaches future educators three central principles about encouraging student authorship: “Students will write when they have something to say, when they have an audience, and when they get feedback.”
Read the “The Challenge of Assessment” section if you need ideas on assessment.
Want to learn more about blogs and rss? Go thru this webquest created by
Trevor Ettenborough 
This article was published 10mths ago, shows how outdated we are. As mentioned by Will Richardson in his article,
For educators, the potential significance of RSS is huge. Think about how teachers and districts could use this syndication process to communicate with students, parents, newspapers, etc. In the classroom, teachers who have students create their own Weblogs can easily keep tabs on what those students are posting by subscribing to their students’ feeds and simply checking their aggregators regularly.
RSS feed’s potential is something which we would defintely want to explore for use in education.
Weblogs of US soldiers, Iraqi citizens reveal viewpoints beyond mainstream media reports from the war front
Read the full article at:
http://yaleglobal.yale.edu/display.article?id=4780