Peer to Peer fP2P1 systenls llave attracted nluch attention in academic coinInu nity and industry circles due to their pronlising applications in various domains This paper presents the attthors’research effbrts oil introducing complex query capabilities in a P2P environ inetit consisting ofnuiIlcrouspeerswithlarge voluine of'data An underlyinghybridP2P computing platfomn. nalncd BestPeer is described first Thc contlection anloIlg peers within BestPeer is sel5 configurable through nlaintaining thc nearest neighbor of peers, and the agent techniques employed in thc system cIisurc its capability of providing sophisticated scrvices The designs of three P2P data Inanageinent systems which&re all based on BestPeer are described in detail Thcy provide support tbr infbrnlation retrieval, query processing and Web services respectively. Advantages and limitations are discussed. while ongoing work is presented Cttrrent systeillS C[IIl provide basic functions for keyword based search. SQL like query processing. and Wcb services querying and discovery Some further topics on providing fully fledgcd data Illanagelnent functionalities for P2P distributed conlputing systems with security gtlal'&ntee are also discussed