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Social networking has continued to expand its empire, and music sites have become its latest victims. From January to June of 2007, the sites where listeners are able to listen to music and interact with other listeners for minimal or no cost, such as projectplaylist.com and rhapsody.com , have had a noticeable increase of unique visitors over sites where there is little interaction with other listeners, such as itunes.com and napster.com . The site with the most traffic in 2007 is projectplaylist.com, which has such features as creating your own profile, creating your own playlist, sharing playlists with friends, blogging.