When I try to research this, I find that I probably don't use the correct search words, or that what I expected is just not there.
First, a link to HigherEd BlogCon, which was in April this year.
Several of the articles in the 2004 collection Into the Blogosphere are on teaching, and I want to point particularly to Remediation, Genre and Motivation: Key Concepts for Teaching with Weblogs.
I find several sites devoted to and discussing education and teaching at higher levels, some of the weblogs of people I think of as friends are among these:
Jerz' Literacy Weblog
With a slight change to my search topics, from education to teaching, I had a larger and more relevant group of hits:
A History Teacher - with several links to other teachers
hipteacher - with a lot of links, but dated 2005
Edblogger praxis - last post oct 2005
EdWeek.org, the Blogboard
I have not been able to find good European examples. There are attempts in Danish and Norwegian, and there is obviously an interest in and a will to use blogs, but not the same enthusiasm as it seems American teachers feel. It may also be that if I had been fluent in German, French, Italian, Spanish, Greek, Dutch and a long list of other languages, I would have found a much wider variety. The many language communities of Europe makes it harder to reach a massive audience - but that may not be neccessary for a good teaching weblog.