[Billy_BAD_Boy]

Actually there are three diesel hybrids currently known to be developed. Two of them are still prototypes and one is scheduled for mass production from april 2011.

Peugeot 3008 Diesel Hybrid Peugeot launches 3008 Hybrid4, world's first production diesel through-the-road hybrid — Autoblog Green
BMW Vision Efficient Dynamics BMW Vision EfficientDynamics spotted during photoshoot in Abu Dhabi
VW XL1 Volkswagen brings 260-mpg XL1 Concept a step closer to reality — Autoblog Green

P.S. As I was typing Volvo introduced new diesel hybrid Volvo Introducing 2012 V60 Plug-In Hybrid at the 2011 Geneva Motor Show - Rumor Central

Looks like bright future for the diesel hybrids.