I found this on Mark Ahlness' blog a few weeks ago and it's a great introduction to blogging for those who are just starting out with it. Alan, Will and Mark are great believers in how edu-blogging and the read-write web in general can empower kids, encourage creativity and independent learning. I would recommend subscribing to their blogs via RSS
(look out for this symbol or 
the XML one so you are automatically updated when they publish a new post.
Happy Blogging!