I am out of order but after looking at other blogs, I realized I misses this part of the assignment. I think what makes a good blog is that it is about a topic that I am personally interested in. I am not going to waste my time reading about something that is irrelevant to me. For education blogs I enjoy ones that give practical advice and examples of things that they are using in the classroom.
I have already mentioned Skype in a previous blog, but I was very excited to find that others are using it. Two new sites that I found today that I could spend all day on are David Warlick's Landmark Project and Cool Cat Teacher. These are examples of great sites for collaboration with other excellent teachers and cutting edge applications of Web 2.0. My only problem right now is feeling overwhelmed with new thoughts and ideas!
I think that the two main ways that blogs enhance existing websites are by the links in them and by letting people share their personal ideas, experiences, and opinions. They are kind of like call-in talk radio. I think it is obvious that blogs are very simple for anyone to self-publish anything with incredible access for the world.