Their launch manifest (http://www.spacex.com/missions) lists one more launch from Vandenberg in 2014, and a few more in 2015. Eventually, if everything goes according to their plans, they will be doing regular launches from the west coast. (Which site they use is determined by which sort of orbit they are shooting for. They will launch from Vandenberg whenever appropriate. Vandenberg is typically used for high-inclination/polar orbits, or the rare retrograde orbit)
