Engaging occupants in conservation efforts is a key part of reducing our ecological footprint. To this end, we have developed the Aware Living Interface System (ALIS), an integrated in-home system that supports residents in awareness of resource use, facilitates efficient control of house systems, and encourages conservation in daily activities. Initial responses from deployments in two highprofile sustainable homes indicate the potential and challenges involved in supporting sustainable living. Author Keywords Sustainability, occupant engagement, interactive ecosystem, resource conservation. ACM Classification Keywords H.5.2 [Information Interfaces and Presentation]: User Interfaces. General Terms Design, Human Factors