Enterprises more and more collaborate with other enterprises in networked organizations. Such collaborations require the business processes of the partner companies to be aligned and integrated with each other, both on a process and data level in a dynamic, ad-hoc fashion. At the first International Workshop on Process Integration of Collaborative Enterprises (PINCET) at WETICE 2006 several approaches for achieving such flexible integration were presented and discussed. This paper gives a summary of the presented papers at the workshop and the final discussion.