sFund is a new $250 million initiative to invest in entrepreneurs inventing social applications and services. The sFund will provide financing, counsel, and relationship capital for a new generation of entrepreneurs to deliver on the promise of the social web.

“We’re at the beginning of a new era for social Internet innovators who are re-imagining and re-inventing a Web of people and places, looking beyond documents and websites,” said KPCB partner John Doerr. “There’s never been a better time than now to start a new social venture.”

The sFund will be led by KPCB partner Bing Gordon, former chief creative officer and longtime executive at Electronic Arts and board director of Amazon.com and Zynga. Gordon said, “Social is just getting started and the opportunities are vast. As in the early days of the Internet, the race is on. Today every business, organization, and entrepreneur should have a social strategy.”

“Social apps are viral, and when they hit, it often happens suddenly, and then they grow explosively. That’s one of the reasons the scalable, elastic, no capex, variable cost nature of Amazon Web Services is ideal for social apps,” said Jeff Bezos, founder and CEO of Amazon.com. “The top three companies that develop for Facebook all use AWS.”

All anchor investors in the sFund initiative are prioritizing developer services for entrepreneurs, who will be part of an active ecosystem. The strategic partners launching the sFund each bring unique contributions. Amazon Web Services (AWS) will provide AWS Getting-Started Support for one year, priority access to worldwide Startup Events, and dedicated business and technical support. Facebook will contribute access to its platform teams, beta APIs, and new programs, like Facebook Credits. Zynga will host periodic sessions with sFund companies to focus on management and technical development, including open source collaboration. Comcast Interactive Capital, Comcast’s venture fund, will provide access to Comcast’s resources, teams, and relationships.

KPCB’s latest social ventures show the breadth of the social opportunity, from seed stage to scale-up, and enterprise to entertainment, including Jive, Flipboard, Cafebots and Lockerz.