Microblogging service Twitter, with 1.2 million unique visitors in May and said to have an estimated value of around $100 million, has inspired a whole range of copycats and sites that aggregate them. - Trisha Okubo
"For example, FriendFeed, Swurl and Spokeo are slightly creepy new tools that allow users to see a wide swath of their friends' online activity in one place." - Jim Norris
