BMW web site has the ECO credit going through 1/4/2010.
Is that order date or take possession date?
I would give the 800 # a ring and see if they can clear it up for you.

The ECOcredit is BMWs rebate not the governments.

__________________
Current - 2010 X5 35d
Retired - 2008 X5 3.0
Retired - 2007 X5 3.0
Retired - 2006 325 3.0