Discussing fuel cells:
 > That's a good point.  What did the earlier ones use for fuel?  I 
 > have a vague recollection of reading about them but can't recall 
 > what they used offhand.
Most require hydrogen in one form or another, and it's easiest from the fuel 
cell technology viewpoint to simply supply the pure gas. However, hydrogen as 
a fuel has lots of problems, especially on a large commercial scale. IE: 
there simply isn't any infrastructure.
Ford Motor Company is the leader in manufacturing alternative-fueled vehicles 
and is having an awful time because of this. Where do you go to get your 
natural-gas fueled auto filled up? :-)
That's why this fuel cell that uses gasoline is so attractive.
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