The Silicon Valley Bicycle Coalition now has a crowd sourced workplace bike parking map online. The map shows bike parking and other commuter facilities available at submitted job locations in the South Bay and Peninsula.
Click on the bubbles for details such as lockers and showers at these locations. You can also view the workplaces as a list.
Only a few job locations are listed so far, so feel free to submit your workplace. Murph also points out this service might be handy for bike thieves.