social bookmarking sites

I skipped ahead a bit, to Exploration 8. I explored del.icio.us and I am intrigued by the concept. I can see where this could be helpful to librarians, teachers, and even business people. Grouping favorite websites and links to one internet location, and tagging so that you can find ones that share the same or similar subjects, could be quite helpful. That you can even retrieve if your computer crashes, because it's saved on the web is a definite plus. This would be better than saving all your favorites on your computer. You label with your tags and then you can search for the ones you might want to use or search for the site you saved, but yet don't exactly remember which site it was. Patrons could benefit by knowing about this concept, and there are many sites now available for keeping your bookmarking info.
In the library, this could replace the old notebooks we organized for patrons on different subjects. Staff could save great sites for homework help, business and health help and so many more. I hope it does not, however, replace our recommended sites, which I find so helpful for patrons. Or perhaps, these could be added to the recommended sites.