The Science Steering Committee of the 2008 Astrobiology Science Conference (April 15-17, Santa Clara, California, USA) invites proposals for sessions related to the major scientific themes: "The Astronomical and Planetary Context for Life", "The Origin and Evolution of Life", and "The Search for Life in our Solar System and Beyond". To submit proposals, and for more details, please go to the conference website, http://abscicon.seti.org. The deadline for submission of session topic proposals is July 23, 2007. Questions can be addressed to: session.proposals@seti.org.