Who matters now?

One of the founders of Sun Microsystems, Khosla is making a name for himself in the campaign to fight global warming. He's become a big promoter of using ethanol as a fuel substitute and is active on the legislative front too. He's also making what, in the cutthroat world of venture capitalists, might be seen as the ultimate sacrifice: He's donating his profits as a general partner of his VC fund to environmental and microfinance initiatives.

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Tell us who you think matters now -- and why