This seems like a story that should be getting a little more attention. I talked to someone this morning who works for a manufacturing firm and they've been having weekly meetings on this for 3 months. They've built up an extra month's inventory just in case, but since every day of strike means about 7 days of backup in the ports, that one month's supply would only be good if the strike lasted for less than about 5 days. Finding alternate routes is difficult, both because other companies will be doing the same thing and the fact that some of their product could freeze if the shipping route goes too far north.