Here's the response I got from my dealer after telling him about the eco credit bye bye after 12/31 issue:

"No worries about your delivery time or Eco Credit. When we submit your info to BMW Financial and place your order everything that was available at that time is LOCKED in for at least 60 Days. I'm still hoping to deliver your car this month but at the latest it will be beginning of DEC. Take Care."

Granted there is a "at least 60 day" lock mentioned... but... otherwise sounds pretty specific. The lock in at the time of application for "at least 60 days" BTW is what I have always heard before on this car buying occasion as well as others - IOW, the position appears to be consistently stable.

spacey