In terms of producing your own methane, yes it is possible. Here are a few books which discuss doing just that: http://www.knowledgepublications.com/methane_uses_and_fuels.htm Methane most certainly does have it's place in the alternative energy arena. One aspect of methane that is not often discussed is that it is readily available in the form of methane hydrates: http://www.mbari.org/news/publications/ar/chapters/06_hydrates.pdf. At some point an enterprising individual will likely make billions mining the stuff. One book I highly recommend is "The Solar Hydrogen Civilization" http://www.amazon.com/Solar-Hydrogen-Civilization-Future-Economy/dp/0972837507. The answers to all our current energy problems are contained in this book using technology and infrastructure that exists today. Energy farming is something that must be done on a smaller more local scale i.e. wind farms in windy states, solar/hydrogen in the desert, kinetic energy near beaches, etc... Even ethanol has it's place. There are many myths about ethanol in this thread. While it is not the end all be all solution it does have it's place and has the capacity to make a small farmer a tidy profit while enriching farm lands and creating edible organic foods using permaculture farming. I high recommend David Blume's book, "Alcohol Can be a Gas!" http://www.amazon.com/Alcohol-Can-Be-Gas-Revolution/dp/0979043778 The final front that has it's merits it nuclear energy. However, using thorium instead which I am quite certain you will discover to be a superior and much more earth friendly fuel than uranium. Good luck with your methane farming should you decide to go for it. Many others have done it before quite successfully!

Producing on board hydrogen or hydrogen at home are both poor methodologies. First off to replace the amount of energy in 20 gallons of petrol you need 40 pounds of hydrogen. This would require 360 pounds of water if all the hydrogen could be extracted. In addition to a massive water tank, you need a system which could compress and store the hydrogen until it was needed adding extra complexity.

For most people, "producing hydrogen at home" means plugging the electrolyser into an outlet, which usually provides electricity generated from coal or some other non-clean source. The point of using hydrogen is that it be cheap and generated from a clean and or renewable source. A more effective solution is to have hydrogen production plants near clean sources of energy: wind farms, coastal wave generators, solar farms, etc.. Once the hydrogen is generated it can be distributed through our existing gas lines and separated via a simple filter at the customers home. Another source is methane. Converting methane to hydrogen not only reduces green house gasses, but yields pure carbon which can be converted into carbon nano tubes. There are massive stores of methane in our ocean in the form of methane hydrate. From the "Solar Hydrogen Civilization", "Production of methane from methane hydrates along with organic wastes from sewage disposal operations, landfills, farms, and forests will provide essential supplies of carbon to build the hydrogen powered homes, cars, ships, airplanes, farming equipment, manufacturing systems, and consumer good for the Solar Hydrogen Civilizaton.", not to mention lots of clean hydrogen.

In any case the technology is there and the resources exist to make the hydrogen era a reality, all that's needed is political support and financial backing. I don't suppose there are any Slashdot millionaires who want to get this started?