Well, now the waiting begins. Just placed an order for an '08 X5 3.0si, spec'd as follows:

Space Gray
Saddle Brown
Dark Poplar Trim
Premium Package
Rear Seat Entertainment
Rear Climate Package
Heated Rear Seats
Cold Weather Package
iPod Adaptor
Running Boards

Thanks to everyone who has provided such a wealth of useful info on this board (especially all the Space Gray/Saddle Brown pics!).