I want to point people to Change This! I think the project has a lot of potential. Most of the talk I have seen has been criticizing the format and not really talking about the ideas. I realize pdf files are not ideal, but the control over design that you have and the ubiquity of Acrobat readers outweighs the shortcomings. I also think they have done a great job of catering to bloggers by creating permanent pages to link to and trackbacks on those pages.
As for talking about the ideas, it will be interesting to see how that evolves. I think alot of blogs have a small set of topics that they talk about. You are not going to find political editorial on this blog. You are going to find business editorial and (more so lately) thoughts on the evolution of blogging. I think that limits in some ways the viral nature of these manifestos. I wonder if ChangeThis needs to create a medium where the ideas can be talked about.
The interesting part of the project is just starting though. ChangeThis! invites anyone to submit proposals. The proposals are put into the Slush Pile and everyone gets to vote. The most popular proposals move to manifestos. I think that is way cool. And it is very interesting to see which ones are bubbling up.