Diigo is a social bookmarking service which we covered briefly while it was in private beta. But the service is out of beta, and has launched a new set of tools that make it easy to mark up web pages, save pages to your account, and search through your bookmarks and those of other users.
Group Bookmarks tagged
Grace Kat (106)
Jeff Johnson (37)
John Evans (36)
Maria Knee (32)
Joao Alves (28)