Found this good story on the Bioconversion Blog.
Flex-fuel vehicles can run on gasoline or ethanol or any blend in between. But the liquid fuel MPG is not very good. Hybrid cars can extend the MPG of an automobile by substituting electricity generated within the car in place of liquid fuel – but you need to run the car on fuel to build up the charge. Plug-in cars run on electricity alone without fuel and can be recharged overnight – but their range is not very good.
Why not build and buy Vehicles that are Hybrids that you can Plug-in for an Electric charge, but that are flex-fuel compatible? The consumer can then choose between the greatest range of options. That’s the vision of a group called Plug-In Partners and they are mounting a National Campaign to get automobile manufacturers to build the PHEV cars.
The campaign encourages on-line petitions, endorsements, fleet orders, rebates and incentives.