Twitter - social networking & microblogging service Facebook - a popular social network that connects people with friends & others
Author Blog - a personal log of thoughts and comment interactions published on a webpage Flickr - online
photo management & sharing application FeedBurner - allows bloggers the ability to manage their RSS feeds &
track usage of their subscribers Digg - a place for people to discover and share content from anywhere on the web Goodreads - see what friends are reading; keep
track of what you've read & organize your book lists Library Thing - catalogs your books online, easily & quickly Google Alerts - email updates of the latest relevant Google results based on your choice of topic Delicious - social bookmarking service that lets you keep, share & discover the best of the web