StepGreen.org: Increasing Energy Saving Behaviors via Social Networks. - Jennifer Mankoff; Susan R. Fussell; Tawanna Dillahunt; Rachel Glaves; Catherine Grevet; Michael Johnson; Deanna Matthews; H. Scott Matthews; Robert McGuire; Robert Thompson 005; Aubrey Shick; Leslie D. Setlock (ICWSM, 2010)