Web 2.0 and Teaching

It seems that this year is the true explosion of trying to make Web 2.0 happen in the classroom. 2005 seemed to be the year of the educational blog, but many of these crashed and burned.
I am in 3 different initiatives which are all looking to figure out how to help teachers bring Web 2.0 into the classroom.
Powerful Learning Practices: Lead by Will Richardson and Sheryl Nussbaum-Beach this initiative is a year long professional development with teams from schools (required that it be a team). The idea is to help teachers work on their own professional practice and then through the 'aha' that comes to all who use these bring to the classroom.
EdTech Leaders Online: This course is a more traditional online course (ironic that I am calling it a traditional online course...isn't it. We have already moved into the time when an online course can be considered traditional). Structured in Moodle, we are working through a set curriculum and interacting through the discussion forums and then we have added a wiki. The elluminate session is optional. The idea is for us to learn a curriculum and course and then teach this course to our teachers/leaders in our region.
Class-centered initiative: This is just developing, but the idea here is that the students should be helping to lead the way. The teacher is a co-learner and together the use of the technologies and how to learn from it are discussed with the students. Right now, this is only being done with blogging in 5 classrooms. This is more of a concept than a true initiative. We have a number of districts heading this way. The idea is to get the technology into the classrooms as quickly as possible. The teachers 'dive-in' and then are supported as they go in whatever way they need.
So three approaches---which is better is the question many may ask. I think that it is more of a match of the approach, teacher, and system they are working within (ie school district/building).
There are negatives and positives to all three. It seems the positive aspect with the first, is that the teacher becomes connected and has made the mental shift needed to be a lead learner. The second approach is more comfortable and helps a larger group of teachers move forward. The final is wonderful for the speed at which we move into the classroom and the students help inform our understanding of the way that learning shifts for not just teachers but also students.
I tend to not talk about the negatives yet, until I have really thought about these and if the issues I see are true negatives or merely different approaches.
Keep exploring,
J:)