Since e-catalogs are dynamic, autonomous, and heterogeneous, the integration of a potentially large number of dynamic e-catalogs is a delicate and time-consuming task. In this paper, we describe the design and the implementation of a system through which existing on-line product catalogs can be integrated, and the resulting integrated catalogs can be continuously adapted and personalized within a dynamic environment. The integration framework originates from a previous project on integration of Web data, called WebFINDIT. Using the framework, we propose a methodology for adaptation of integrated catalogs based on the observation of customers' interaction patterns.