It looks like this blog will be interesting. Full marks to The Observer.
The post that caught my eye at first was this one from Nick Cohen about how he sees blogs.
Update: See also Neil McIntosh’s post.
Bloggers, [unlike columnists], are subject to constant peer review. The speed and brutal effectiveness with which they are held to account is already crossing over into the mainstream. Ultimately, it will change the way political and cultural debate is conducted.