Researchers at the University of California at Davis have created an ingenious "Virtual California" model of faults and their potential movements predicting the next quakes to hit california. "The Virtual California approach to earthquake forecasting is similar to the computer models used for weather forecasting, said John Rundle, director of the UC Davis Computational Science and Engineering Center."
There is a Quicktime movie link that shows the predicted simulation in the article, but be aware that the file takes a bit to load and takes up a bunch of bandwidth.