My prediction? It runs all week and if the MTA doesn't break, the Union will use Christmas to end it and still save face.
Also, Steve Gilliard has a great point about the Manhattanites complaining about the strike because of the burden it puts on the poor:
People seem to forget that it takes $40K to live in New York, yet they now care about people making less. Most of the time, they never give them a second though. But now, the burden of these people is placed on the union?