Okay here is a bit of crazy thought, mostly in the form of questions.  I have very little knowledge in these areas, so I am only opening up the dialogue.  There apparently is a growing glut of wet gas, of which propane is a large component.  Propane powered vehicles have been around for a long time.  Forklifts and many other vehicles are currently powered by propane.  Propane has a higher btu potential than methane.  An infastructure for the shipping and sale of propane already exists.  My occupation is heating and air conditioning in Wyoming where a large number of customers burn propane to heat their homes.  The conversion of a natural gas/methane furnace to propane is relatively simple; orifaces are changed, pressure is adjusted, and a small modification is done to the gas valve.  Why couldn't new vehicles to be sold now to run on natural gas be temporarily converted to burn propane while the infastructure to market natural gas is still under construction?  ( The technology and conversion kits are already available to convert older vehicles)Would there be enough savings at the pump?  Is ther really enough of a wet gas glut?  Could some of the surplus ethane be used to enhance or boost the power of the propane?  Would this accelerate the common use of domestic natural gas/propane products to the general public, perhaps condition them to its use more rapidly?  I look forward to hearing some answers.