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"Necessity is the mother of invention." As social networking has become a reality so has the need for both public and private directories. From the public or social side, users can tag their favorite sites to browsr allowing others to comment on them. These tagged sites can focus on products and services or other well-known sites and weblogs. From the private side, users create their own directories. Much like bookmarking, users add their own categories populated with their favorite sites. These private directories can be shared with select audiences. It is like having a mobile "favorites" or "bookmarks" directory. As an added feature, owners of private directories control whether other users can blog the sites they have tagged. (Note: private directories are not yet implemented in the current beta version but will be in the next version).