Social Bookmarking

Just wanted to plug the social bookmarking tool, Diigo, that I use for recording interesting and useful sites connected with ICT, technology and education. Having tried one of the long established social bookmarking sites, del.icio.us I've found Diigo to offer much more functionality. Some people say it's more complicated, but really I found it takes only a little time to adapt. It's widely used by others in education and makes finding material and resources so much easier. The one main disadvantage I do find is that the toolbar for diigo doesn't work too well with Firefox. Diigo doesn't always seem to have compatible add ons, so you somwetimes have to switch to Internet Explorer in order to bookmark a new site. Nevertheless, as with any social networking site, it offers a good way to improve your expertise through groups and by following people with similar interests. My personal bookmarks are at http://www.diigo.com/profile/royston_vasey.