Very cool to know another Californian with an E90 coming on the same boat! What dealer are you purchasing from?
Your salesman can do a "Vehicle Inquiry: Status" on the BMW internal network and give you all the following info:
VIN, Product Number, Status, Actual Production Date, Priority, Customer Name, Port Location, Destination Location, Shipping Vessel Name, Voyage Number and Bill of Lading Number along with other seemingly meaningless info.
Keep in touch.