On May 18, the California Department of Education (CDE) published information on 2008-2009 Advanced Placement (AP) testing by school.  While not as detailed as many of their other testing statistics, but it does help to paint a picture of which schools are more college preparatory than others.
The original datasets can be found at: http://www.cde.ca.gov/ds/sp/ai/
I've sorted the information just for the Bay Area and added the city information too. 

The top Bay Area schools sorted by the percent of tests with scores of 4 or higher are:

/1 All High Schools with at least 50 enrollment for Grades 11&12 and a participation index of 20 or more
/2 Index equals the number of AP tests divided by 11th and 12th grade enrollment.  Students may opt for more than one AP exam and an index of more than 100 is possible.
/3 AP tests are scored from 1-5.  Most colleges accept scores of 4 and higher as meeting a college level prerequisite.
       Students may take one exam per subject per year, but may also take multiple exams in different subjects.

In response to a question on the forum, the California Department of Education (CDE) does publish information on Advanced Placement testing by school.  It is not as detailed as many of their other testing statistics, but it does help to paint a picture of which schools are more college preparatory than others.

The original datasets can be found at: http://www.cde.ca.gov/ds/sp/ai/

The latest data are for the 2006-2007 school year.  I've sorted the information just for the Bay Area and added the city information too.  Here's a link to the 6-page PDF file, and to the XLS summary.