My suggestions so far for improvement are:
1) add a section on best/practices case studies on how progressive organizations are using social media tools. This could be linked to the Tools section so the description of each tool followed by a list of organizations actually using it.
2) add a way of organizing info by topic and making it searchable to make things easier to find.
3) add links to great content on existing social networks. For example, links to great photo albums on Flickr or Facebook groups that might be of interest to the progressive community.
4) add a section on hot topics on social networks, i.e. this week's top trending progressive Twitter topics as chosen by users.
5) say who wrote and edited the content like on Wikipedia. Right now there is no indication of who created what.
6) stop using the "online encyclopedia" metaphor. Encyclopedia has a strong old school, Web 1.0 connotation. The Toolkit is the opposite of this.
7) This is a subtle one but change the message you get when you click the "Write to Editor" button at the top of articles from, "You can send Editor a message using the contact form below." to, "You can send the Editor a message using the contact form below." This small change makes it sound like it's coming from a human not a computer.
My other problem is I don't have an Edit button at the top of the Toolkit pages so I can't add or edit anything but this is just a beta bug.
Any one question: why not just link to Wikipedia definitions instead of re-creating them under Articles? (and putting definitions under Articles is confusing)