Southern California real estate appreciation slows to less than 3%

"For the first time since the latest housing boom started six years ago, home price appreciation for each of the six Southern California counties has fallen to single-digit levels or worse, data released Tuesday showed." (more)

While it seems obvious that the days of double digit home appreciation are over in Southern California, when will we see price depreciation? More important, how much price depreciation will we see?

Already, some economists are speculating that the Fed might actually lower rates in early 2007, which could push mortgage rates lower as well. Would this delay, or even prevent, such a downturn? Could it cause another mini-boom?