Google's philanthropic arm, Google.org, is putting some of it's gigantic pile of cash behind plug-in hybrid electric vehicles (PHEVs). Right now, their initiatives include hacking Toyota Prius and Ford Escape hybrids to be plug-ins. Their Prius plug-ins are getting about 75 mpg, a good boost over the 40 mpg of regular Prius models.
Google plans to fund at least $10 million in PHEV projects and hopes to expand it's plug-in fleet to at least 100 vehicles. In addition to promoting the idea of PHEVs Google is also working on the technology behind vehicle to grid integration.
