"Federal agents raid Bowers Museum for smuggled antiquities." (O.C. Register)
For really interesting reading, also see the search warrant (PDF). This is all shocking, but not entirely a surprise.
Also see more in the L.A. Times, on the Orange Juice Blog, and in video coverage on KABC-TV.
Oddly enough, before this story broke I was going to write that Bowers' blog has a feature on O.C.'s pre-historic cogstones. But clearly, this is bigger news.