80GB Zune not shipping yet?

Two days ago on November 13th Microsoft said the new Zune players are available. Now reports come in that the 80GB Zune is not shipping.

I have seen that many pre-ordered the 80GB Zune on Amazon.com already weeks ago. Apparently the orders have not been filled.

Zune Scene quotes an inside Microsoft contact saying that the Zune 80GB is 6 weeks behind production schedule. There are supposed to be 80GB Zune players coming in the next weeks.
More details on Zune Scene.
Engadget quotes a Best Buy tipster stating a December 12th shipping date for the Zune 80GB. More details on Engadget.