I was wondering when you start to research the social bookmarking session then you might try using Delicious and document what you find. For instance, if I was researching what is social bookmarking and how might it be used in education, then I would fire up google and start a web search. However, it would be a really good example of the power of social bookmarking if you started from Delicious. It would be a different search strategy, in that you might look at boroad tags, social bookmarking and various of, then start to focus in on people. Just a thought.