I'm not sure if this is just cheerleading for web 2.0, but some of the ideas look promising. Don't know if they'd work out in practice. From Nov. 2005.

I would love to one day see Clipmarks used in the class room to help students more collaboratively save and share information they find online.

Eric, this is not exactly on-topic, but I was thinking about this idea -- which I think is great -- and trying to consider the obstacles to adoption. The main thing is probably the fact that you have to install software before you can clip anything. Have you ever considered building a lightweight java bookmarklet clipping tool to make adoption easier for skeptics?