I'm in the market for one and was told no plans for the 2.0d in the US.
The diesel would be a perfect engine for this platform, but with diesel fuel prices as ridiculous as they are here, then its a wash on getting better gas mileage but paying more for fuel.
Gotta love our economic system! But if/when there is a 2.0d X3 in the US, I'm all over it!