I don't know if this has been posted somewhere earlier in the thread, but the OP makes it sound as if East Coast deliveries always come from WW. But in fact, I found out this weekend that my 328xi left Bremerhaven on a K-Line ship, Western Highway, on 6/5 and is destined for S.C. on 6/21.
The traking of cargo seems to require a bill of lading, which I don't have for mine. Otherwise, the website is not that helpful. www.kline.com