If you want to cruise out of Cali I would go Mariner of the Seas here are the ports:
Los Angeles, California; Cabo San Lucas, Mexico; Mazatlan, Mexico; Puerto Vallarta, Mexico; Los Angeles, California
This is a seven day cruise that leaves on June 28, 2009. It's not quite as nice as Hawaiian, but the Mariner is one of the bigger Royal Ships with the ice rink, rock climbing wall, and royal promanade. No Flowrider on this ship sorry. Plus Mexico will be nice and warm.