Remember when I was wondering recently about a fuel powered electric motorcycle? I thought, why not build a motorcycle using an electric motor but then generate the electricity on board with some kind of fuel powered generator instead of a battery so you had electricity as long as you had fuel and you could refill quickly instead of recharge slowly. I just saw this little butane fuel cell soon to be sold by Brookstone that can recharge your smartphone 10 to 14 times or any other electronic device multiple times before needing to be recharged itself with a new butane cartridge. Swap cartridges and you're good to go. Right idea, if only it would scale.
Of course, fuel cells are the next step beyond what we were talking about in the other article, there we suggested a more basic setup using gasoline with some type of ICE powered generator, here we're using butane in a fuel cell, no actual generator involved, but the focus is on making electricity rather than simply trying to store it.
Storing electricity for mobile applications like motor vehicles is a very rough road where everyone stumbles. It's notoriously hard to store it in the amounts required to do serious work. For stationary applications, electricity is unbeatable.