Slowly but surely. Coal makes sense because we have more of it than any other resource. If we can use it in responsible ways then why not? I know the environment purists (nazis) don't like anything with hydrocarbons in it but until we have something better this is one way we can lessen our dependence on international oil.
Because those who currently hold the reins of the oil drilling, delivery and refining infrastructure do not yet hold the patents for the processes to refine liquid fuel from coal.
Until they do...and when oil is no longer available to be pumped from underground...we will not see cheap, clean fuels from coal.
Not too cynical am I?