Kleiner Perkins Caufield & Byers (KPCB) today announced the sFund, a new $250 million initiative to invest in entrepreneurs inventing social applications and services. Amazon.com, Facebook, and Zynga, the leading companies defining today’s social and online environment; entertainment and media leaders Comcast and Liberty Media and Allen & Company, LLC, have committed to invest in the sFund and serve as strategic partners. 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.”