I'd line up to buy one.
Earlier this year I purchased a new Mercedes ML-350 Bluetec (AWD, 240-hp, 455-ft-lbs V-6 Diesel) and my wife and I love it! She averages around 23-24 mostly city, but we easily get 31-32 highway driving 70-80mph. If we keep it at speed limit, 65-70 we average 33-35mpg. Strangely, it's rated 20/27 and I've never acheived those numbers-ever.
Anyway, that's my experience with mine so far. Interestingly, the day I bought it and was waiting for them to prepare and clean the car for me, I saw in newspaper article about Americans Warming up to Diesels. It had the Ram pictured and mentioned the Chevy (Cruz is it?).
Hey, at least they're offering the option now!