The main objective of this document is to bring together our assumptions, models, definitions and other findings regarding actor-agent teams, and effectiveness thereof. As such, this whitepaper by the SEAT project contains our findings on sustained effectiveness of actor-agent teams of the first half of ICIS research programme. The foundations of our research reported herein are formed by three main topics: actor-agent teams, effectiveness, and methodology. This document contains material to gain insight in the width and scope of actor-agent communities, and should be treated as a starting point for additional research and explorations. These demarcations are necessary to restrict the amount of information and effort to manageable proportions.