Denizens of San Francisco may soon be able to add fresh produce to their Amazon orders as part of an expansion to the companys AmazonFresh program. That $299 a year service delivers grocery items overnight to customers, though is currently limited to Seattle and Los Angeles. San Francisco is the next city on that list, says All Things D, which adds that some of the companys signature green trucks have already been spotted around the city. Amazon quietly launched AmazonFresh in late 2007 in very limited distribution near its headquarters in Seattle.