Syngas is made from the slow burning of wood waste in a very low oxygen atmosphere. The gases are known as "producer gas" and can be directly burned in a diesel engine as if it were propane. I've seen it power a Kohler generator without modification. I would hope Cat makes a dual fuel generator which can directly burn producer gas.
Producer gas can be made into "producer oil" and then fractionally distilled into biogasoline, biodiesel, bioheating oil, and bioroad tar. The biodiesel will power a standard diesel engine without modification. The forest industry produces billions of tons of waste wood which can be used to create syngas and biochar. To avoid having this post too long and to learn more, please visit: http://algaloildiesel.wetpaint.com/page/SYNGAS+AND+BIOCHAR
Many communities and states prohibit the running of diesel generators, except as standby power, because of the pollution issue. By burning producer gas and/or biodiesel, that issue goes away (except for NOX's). A catalytic converter can get rid of the NOX's. Thus Cat (or any manufacturer) would be able to sell into the farm-size operation and into the small towns and villages a CHP system which provides for District Heating and local distribution of electrical energy. This progam is a "grow your own" approach to sustainability.