People may have trouble converting to BTC if more exchanges go down, causing a sales disruption. And what about CA sales tax? Will you be paying that out of the posted prices or is it tacked on to the bill later? At 7.5% it's nontrivial.

Also, you may want to meet with a tax lawyer about accepting a "foreign" currency instead of dollars. There could be a CA statute written to keep pesos out of circulation, but it could affect you if applied to Bitcoin.