Green news harvest: 500-mile fuel cell car, Linux gets 'green flag'

Here's a sampling of green-tech news and quick commentary:
• Linux captures the 'green' flag, beats Windows 2008 power-saving measures - Network World
  Tests give Linux the edge on energy efficiency, although your "wattage may vary."
• Toyota develops improved hydrogen fuel-cell vehicle - Reuters
  The fuel cell vehicle, for lease in Japan, can go over 500 miles on a tank in very cold temperatures.
• Stion leaves photovoltaic patent trail - Gunther Portfolio
  Stealthy solar start-up Stion says it will beat everyone on price but never says how. Gunther Portfolio digs into patent applications for clues into its PV material.
• Grease shortage worries Oregon's fledgling biodiesel industry - OregonLive.com
  The "grease crisis" is threatening to cripple the biodiesel industry in Oregon.
• DuPont eyes generating $1 billion in solar-related revenue - MarketWatch
  More solar production in China. The surge in production is expected to bring panel prices down significantly in a couple of years.
• Water Arc's water recycling gets a boost at Cleantech 2008 - Green Prophet
  An Israeli firms says that 40 percent of a home's water, including its gray water, can be reused.
• Biofuel backlash: High prices, pollution worries hit consumers - Seattle Times
  Reality check on rising prices of biodiesel, which at $6, is $2 more expensive than petro-diesel. Imperium is exporting to Europe where it can charge more, while some plants are being idled (via Earth2Tech).
• The Democratic National Convention will run on beer - MainStreet
  Coors will convert substandard beer into ethanol which will be used to transport delegates around Denver.
• Harnessing microbes to meet our future energy needs - ScienceDaily
  Biomass and PV panels aren't the only way to harness the sun's energy--tiny microbes can, too, be enlisted, says biotech researcher.