The World Wide Web is increasingly seen as an attractive technology for the deployment and evaluation of groupware However the underlying architecture of the Web is inherently stateless - best supporting asynchronous types of cooperation This paper presents a toolkit for application developers, MetaWeb, which augments the Web with basic features which provide new and legacy applications with better support for synchronous cooperation. ree simple abstractions, User, Location and Session, MetaWeb allows applications to be coupled as tightly or as loosely to the Web as desired The paper presents two distinct applications of MetaWeb, including the extension of an existing application, the BSCW shared workspace system, from which a number of observations are drawn