Earlier this week I completed the Del.icio.us bookmarks. I think it is neat that you can share your favorite sites with other people and can be used in the library as reference pages. A library could bookmark pages that tell things such as how to do citations in MLA or other formats. You could have a link to dictionary.com and your own OPAC. Google Docs is really neat. I haven't looked at this a great deal yet but I feel that this is a very useful social tool.