If you would like to promote your websites and share information with other surfers, then you might want to join a few of these social networks. That way you will also create a few natural links to your web sites and to your favorites. (And you can create networks of friends and business contacts by placing a link to your abbreviated Facebook profile -- for example, http://www.facebook.com/people/David_Maxwell/633321643.) The networks (and when I find and join new ones, I list them on http://twitter.com/affiliatebin): Bebo
bizpreneur Blogger del.icio.us Digg Facebook Flickr FriendFeed Friendster Jaiku Jumpcut Kiva Last.fm LinkedIn LiveJournal Multiply MyBlogLog MySpace Plaxo Second Life StumbleUpon Squidoo Technorati The DJ List Tumblr Twitter Upcoming Yahoo Answers Yelp YouTube Update, 23 April 2008: Wikpedia has a good list of social networking sites.