As part of my PLP course we were asked to experiment with a social bookmarking site. I already use Diigo . Delicious seems to be very similar. A group that I travel with used Diigo last year for an annual trip we take. We go to the Caribbean for a week and always rent a house. We bookmarked houses to rent. It made it easy for everyone in our group, not all of us live in the same area, to show what they had found. We also used the bookmarking site to look for houses to rent. In the classroom I use this with students as a research tool.