del.icio.us

This is a tool that I think is very handy and have used it before in a work capacity. We created an account at the reference desk at my old job. It held all of the sites that we found useful for various assignments, reference questions etc. Anyone working on the desk would add bookmarks so that folks working the desk later could easily find what others had used and found useful. It was a great tool - one that i always said i'd use independently - but I actually never have used it in a personal capacity. I don't tend to bookmark all that much stuff. Great site though!