From here:
http://www.e90post.com/forums/showthread.php?t=828
"En Route
As soon as your status changes to “In Transit” on the 800 number, or to “En Route” on the OC, check the shipping company’s website (Schedules) to figure out what ship your car is on. Or just call your dealer; they know exactly what ship your car is on, and the estimated times of when it will arrive and leave the Prep Center. The dealer has a tool that tells you everything, so leverage this to get the name of your ship so you don’t have to guess.
For east coast deliveries, the shipping company’s website (Wallenius Wilhelmsen) is
http://www.2wglobal.com/www/WEP/index.jsp. They update their schedule in real-time and changes the color of the ‘stops’ to Red after the ship arrives at different ports, signifying that the ship has docked. My ship took exactly 11 days to get from Bremerhaven to New York City. Sometimes, if your ship reports its status, you can track your ship while it makes its way across the pond. Go to
http://www.sailwx.info/ and search by ship name. Keep in mind that my ship never showed up, so its really luck that you may see it.
For west coast deliveries, the shipping company's website (NYK Lines) is
http://www2.nykline.com/home/index.html. You can also use
http://www.dbh.de/index.php?id=151&L=0
to track the departure of your ship from Bremerhaven to Port Hueneme. Apparently NYK Line doesn't make it easy to find your ship. After that, if you want to know when your ship is planning to dock in San Diego, San Diego Marine Information Systems will give you the arrival schedule for Port Hueneme (west coast delivery) at
http://www.sdmis.org/schedule/."
I am on West coast, but my carier is also Wallenius Wilhelmsen.