Social Bookmarking and Annotating on Crack

Daisy twittered about Diigo today and that was all I needed to draw me away from what I should have been doing and into something that I would have rather have been doing. It is like del.icio.us meets Google notebook, meets instant messenger 2.0. I have been playing around with it this morning and it looks pretty cool.

They now have a free premium account just for teachers that will allows them to interact with and follow their students research. Definitely something worth checking out!