Social bookmarking, social networks - the discussion continues. Social bookmarking fosters collaboration in resource discovery. Also, harnessing collective innovation with web 2.0. Also, five sites you need to know in social networking. Miguel Guhlin links to the Wikipedia list of social networking sites. "MySpace shows 86 million users, Facebook shows 7 million, Bebo shows 22 million, and Flickr shows 2.5 million." You may also want to look at a blog from PARC called PlayOn, which looks at the social dimension of virtual worlds. FutureLab (via Scott Leslie) offers a longish look at the topic. Well written and clear, it defines social software (via Stowe Boyd and Clay Shirkey), looks at audio-visual and other implementations, and then asks, does learning change in an information society (hint: yes). MySpace, meanwhile, is used to spread information about Blackboard and to replace the Yearbook Committee.