interesting, thanks. Some questions and a comment: Why place journal articles in 'physical' only? there are excellent e-only journals and hence e-only articles. Also, the traditional concept of an 'article' is changing, so, given interactive elements and all, I guess what you call an 'article' may come in a new shape (just consider, e.g., OAI-ORE) and might well move towards what you mark as central affairs of 'Research 2.0' - Claudia Koltzenburg

nice. I would place Wikipedia further towards formal myself and on a trajectory heading further in that direction. Peer review on WP can be as rigorous and infuriating as any journal. Not always of course but sometimes and becoming more so. - Cameron Neylon from fftogo

Thanks for the fast feedback. I am working on blog posts to put the two diagrams into more context. The lines between online/informal/UGC and print/formal/traditional are certainly blurred more than the diagram highlights. It is my hope that by situating items in their traditional orientations on these scales, I can better demonstrate the blurring of those lines to a general audience. I will take all feedback into consideration when preparing a second version. - Michael Habib

What did you have in mind when you put private sharing as "more formal" than public sharing? - Mr. Gunn

Not sure now that I look again. I don't think I would put private sharing there anymore - Michael Habib