Adaptive Web-based Database Communities Athman Bouguettaya 1 Boualem Benatallah 2 Brahim Medjahed 1 Mourad Ouzzani 1 Lily Hendra 3 1 Department of Computer Science, Virginia Tech, USA {athman, brahim, mourad}@nvc.cs.vt.edu 2 School of Computer Science and Engineering, The University of New South Wales, Australia boualem@cse.unsw.edu.au 3 Litton PRC, USA hendra_lily@prc.com