I really like everything that can be done with Diigo. I have been using evernote for capturing screen images, and making notes, but it is not nearly as powerful. I signed up for diigo, and will start using it as my bookmarks, now. The only thing that diigo is lacking is an application for windows mobile phones. I like to be able to take pictures, or voice notes, and have them on evernote.
Next semester I will find places that I can utilize the bookmaking and highlighting functions of diigo in my classes.
12 minute Del.icio.us tutorial link is dead