1. A computer-implemented method of administering a peer-to-peer file sharing computer network, said method comprising: maintaining a reference associating a particular shared file with a seeder in a community of peers and a number of seeders in said community of peers; broadcasting, by the seeder, a deletion of the particular shared file by the seeder; receiving, from a second peer, in response to the broadcast of the deletion of the particular shared file by the seeder, a notification that the second peer offers to take ownership of the particular shared file deleted by the seeder; and registering the second peer as a second seeder of said particular shared file.