Flight Global's Flightblogger, Jon Ostrower, is in Seattle and has been busy speaking with machinists and generally getting a pulse on Boeing. He speaks about the 737 wing team that was sent home yesterday for lack of activity. He describes what seems like deliberate work slowdowns.
The IAM membership seems to be carrying out its threats and possibly defying its leadership's request to go back to work. Jon also mentions that the leadership might put a stay on the strike tonight if they feel Boeing is moving closer.
But the reaction on the shop floor seems to indicate members are already playing out what they see as the only next step.