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David Weiden, 36
David Weiden, 36
Khosla Ventures

A veteran of startups Netscape and Tellme Networks, Weiden handles Internet investing for Vinod Khosla's firm, which is better known for its alternative-energy stakes. Already buzzy companies in Weiden's portfolio include Spotrunner, Jawbone and Loopt.

NEXT: Kevin Efrusy, 36
Last updated July 19 2008: 2:17 PM ET
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