Also, Accel Partners has distributed a large chunk of its own position in the social network to the investors in its venture funds.

FORBES: Facebook: Some Venture Investors Are Moving On

Social Venture Partners in Seattle is another part of the network designed to wake entrepreneurs to new possibilities.

FORBES: The Radical Philanthropist

Social Venture Partners in Seattle is another part of the network designed to wake entrepreneurs to new possibilities, (see sidebar).

FORBES: The Radical Philanthropist

Mailman suggests that novice investors check out the Acumen Fund, a non-profit venture fund that invests in innovative leaders and social enterprises throughout the developing world, and TONIIC, a network of investors, entrepreneurs, funds and thought-leaders working to provide early-stage funding for global social enterprises.

FORBES: Philanthropy, Now Yielding Financial Returns

Now Madisch oversees a small but growing social network for scientists called ResearchGate, based in Berlin, Germany and backed by several U.S venture capital firms.

FORBES: How Ijad Madisch Aims To Disrupt Science Research With A Social Network