According to the SF Giants website, the 2012 World Series Trophy Tour will be stopping in downtown SLO on February 14th. It will be in Farmers Market like it was a few years ago. The website says 6-8 pm.
If you want a photo with the trophy, I’d recommend coming early. Last time they did this, the line was a block and a half long down Chorro Street.
This is a video from the last tour.