Thing #6 Social Bookmarking

I am learning about Thing #6 - Social Bookmarking.
I have bookmarked the website
http://www.webology.ir/2006/v3n2/a25.html
I thougth this passage from the article was interesting
"A more exact definition and theory for Library 2.0 is necessary to focus discussion and experimentation within the community, and will be valuable in the implementation of new web-based services in the next several years (it is at this point important to note, as Breeding (2006) does, that many libraries are still struggling to adopt simple, static web-based services; interestingly, there are Web 2.0 services, such as the Public Library Interface Kit, or “Plinkit”, that could assist in this struggle). "
more later....