After waiting 2 years (first for the diesel, then the new iDrive), I finally ordered a 2010 3.5d. It should be built in October and I'm leaning toward factory delivery:

Space Gray / black interior
Adaptive Drive (now a $3,500 option)
Comfort
Roof Rails (now $100 option)
3rd row
HUD
Sat
ipod adapter
smart phone integration
Sports package
Premium Package
Premium Sound
Rear Climate
Tech package

I think the new gut chuck for American X5 buyers is Adaptive Drive since it is no loner part of the Sports Package. Adapative drive $3,500 sticker, and supposedly $3,185 invoice, with the Sports package sticker at $2,200. I bit this expensive bullet (among others) because handling is on of the primary reasons I buy a BMW, but yikes it is not cheap and I think many folks will take a pass.

I also plan to replace the wheels with 20" 214 Y spokes.