I signed it, but I imagine a diesel JK Unlimited would approach the $40k mark rather quickly. I'm just not in that market right now. But with newer clean-diesel engine technology, ultra-low sulphur fuels, and the increasing acceptance of fuels containing biodiesel, diesel makes sense for the US market--both economically and environmentally. A diesel-powered Jeep brand Wrangler-type vehicle would indeed be the bee's knees. For the last few years, Jeep has continued to float the diesel-power idea in tandem with Wrangler/truck-platform concepts: the J8 Sarge, Gladiator, and Nukizer M715, for example. Testing the waters, teasing the buyers, or priming the public? Hopefully, we will find out soon.