As our lives become ever more digital, we face the difficult task of navigating the complex information spaces we create. The fields of Human-Computer Interaction (HCI) and Information Retrieval (IR) have both developed innovative techniques to address this challenge, but their insights have to date often failed to cross disciplinary borders. In this one-day workshop we hope to explore the advances each domain can bring to the other. Following the success of the HCIR 2007 workshop, co-hosted by MIT and Endeca, we are once again bringing together academics, industrial researchers, and practitioners for a discussion of this important topic.