One interesting session at ScienceOnline09 was Social networking for scientists, moderated by Cameron Neylon and Deepak Singh. We now have so many of these social networking sites, that it becomes difficult to differentiate between them and to see how they can interact with each other. One important category is social bookmarking sites for scientists. I spoke with Kevin Emamy from CiteULike to find out more. Most of the CiteULike team.