The American Linear Collider Physics Group will hold a 3.5 day workshop on the physics, detectors, and accelerator research related to the International Linear Collider. The workshop will take place at the Stanford Linear Accelerator Center from Wednesday to Saturday, January 7-10, 2004. This workshop continues a series of North American workshops held over the past several years, and parallels similar series in Europe and Asia.  All physicists engaged in, or curious about, the Linear Collider are invited to attend.