This issue of "Architecture Bulletin" features materials generated during the 2007 "Architecture 2.0" symposium in Rotterdam. Participants include Francine Houben, Ronald Rietveld, Wiel Arets, Jochem Heijmans, Ben van Berkel, Marten de Jong, Willem Jan Neutelings, Winy Maas, Sander Lap and Rem Koolhaas.