Social Bookmarking

The concept of having bookmarks available no matter where you are instead of tied to one computer is most useful. The tagging has some advantages as does using tags already present and assigned by others. Of course, isn't that we do with MeSH and LCSH plus a little textwording thrown in?

I read the articles on Connotea and Citeulike and found those more intriguing than Delicious. To be able to use the bookmarks and roll it all into a bibliographic manager has real potential. Connotea is limited to science and could be more applicable to medical libraries. These two resources sound like they offer possibilities worth exploring.