Laughing Squid brings up a rumor we've always, always, always wanted to know whether or not it was urban legend or hard fact. Namely, that George Lucas used the Oakland container cranes in Oakland as his muse for the AT-AT walkers in The Empire Strikes Back. (Please, SFist readers at ILM in your pretty Presidio offices, ask the big boss if this is true or false. We beg of you.)...