So with the rise of smartphones to be the front line in Silicon Valley and beyond, what approaches were open to Zuckerberg?

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In front of you is the Valley of Death for investors.

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Late in the fall, during a rare lull in his work on the Mars program, Grotzinger and I took a drive to Death Valley due east from his house in lush San Marino, across the front range of the San Gabriels, past Apple Valley and Barstow, and down into the great basin of the Mojave.

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Jed York, the 49ers CEO, has hired several executives from Silicon Valley tech companies for key front-office positions, including former Facebook Inc. executive Gideon Yu, who is now the team's president and a part owner.

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After Alberto Herrera , chief executive of fledgling wireless-sensor network company Medida , pitched his firm to a panel of four top-tier Silicon Valley venture capitalists--in front of a standing-room-only crowd of some 350 people-- Josh Stein of venture capital firm Draper Fisher Jurvetson was so impressed that he asked Herrera to set up a meeting.

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What's more, as producers retreat from the front lines, exhausted from battling the latest Silicon Valley startup and its kamikaze products, shareholders will cheer.

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Like so many times before, Rob was up front -- leading a patrol of two dozen Afghans and Americans on a narrow trail along the valley floor, the steep mountains towering over them.

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If Mr Campbell is not the obvious Republican front-runner, this is mainly because he has much less money than his two billionaire challengers from Silicon Valley, Meg Whitman and Stephen Poizner.

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