1. A peer-to-peer network system, comprising: a plurality of peers, wherein each peer comprises a network node configured to communicate with one or more other ones of said peers over one or more networks; a peer advertisement for each of said peers, wherein each peer advertisement comprises an identification of and communication address for a corresponding one of said peers; a plurality of peer services or content provided by one or more of said peers; and a service or content advertisement for each of said services or content, wherein each service or content advertisement comprises an identification of a corresponding service or content and an indication of how to access the corresponding service or content.