Aargh! I was just bookmarking in Symbaloo and now I want to switch to Diigo! I like the highlighting option and the possibility of creating notes. Diigo and Delicious look alike in the bookmarking part but Diigo can offer a little more features, like highlighting and posting notes that make it more appealing. I may change it in the future, but now I am fine with Symbaloo. I like the organized chaos I created and I find things very easily there. I also like the layout used for the readers.
During the last semesters I have been using a quickbookmark page to gather all the websites that could be interesting for my students, but I see how Diigo and Delicious allow for much greater interaction and are designed for group activities. The feature I think is the most valuable in an online class is the ‘sharing’ option. I really like the opportunity to create a RSS with my bookmarks. That way I can filter the material I want students to work on without taking away the sensation of surfing the web. And I think this is very valuable because it empowers students to put themselves at the center of the learning process. We know that when students have strong control over their education, they learn in a deeper way. Pretty cool!