Looks to me like BMW is trying to maximize the economies of scale with the N55 hybrid powertrain across 3/5/7. I'd bet we won't see a diesel for a few more years until they get a sense for if the 3 Hybrid sells at a better pace than the old E90 335d. My guess is also that BMW will try a hybrid sedan and diesel SUV strategy... we will probably see a X3d before we see a F30d or F10d.
In fact, given the delayed 2013 release for diesel and the increased ecocredit, I might even be willing to gamble on an engine change for the 2013 X5d and then that same new engine also being released in the next year for the X3. If you go to the international site, there is no more 35d... just 30d and 40d. While 40d would be nice, I think 30d makes more sense for a combined X3/X5 offering. And BMW has already set precedent by giving us a lower output but cheaper 7 hybrid.
2013 BMW 335xi Sedan
Estoril Blue / Black Leather
6MT, M-Sport, Premium Pkg, Cold Weather Pkg, Dynamic Handling Pkg, Tech Pkg, HK Sound, M Performance Exhaust, M Performance Power Kit
Former: 2011 335xi Coupe -- 2009 MCS JCW -- 2006 MZ4 -- 2002 325i -- 1997 318ti -- 1991 318i