(Reuters) – Twitter co-founders Biz Stone and Evan Williams plan to revive Obvious, the company they conceived years ago as a technology project incubator that eventually spawned Twitter.

Stone and Williams will continue to advise Twitter on strategic matters, but devote the lions’ share of their time to The Obvious Corporation, Stone told the Aspen Ideas Conference at the ski resort on Tuesday.

The pair, along with others such as Jack Dorsey, who now runs payments service Square, created the four-year-old website that allows users to send 140-character messages across the Internet. It has grown into a microblogging phenomenon used by celebrities and heads of state alike, hailed at times as a crucial tool in promoting

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SAN FRANCISCO, June 22 (Reuters) – Square, a start-up company seeking to change the way people pay for goods, has enlisted a board member who knows a thing or two about money. Former U.S. Treasury Secretary Lawrence Summers has joined the two-year-old San Francisco company’s board of directors, Square said on Wednesday. The move represents [...]

(Reuters) – Renowned venture capitalist Vinod Khosla is joining the board of Square, a company headed by Twitter co-founder Jack Dorsey that allows consumers to pay for goods using their mobile phones. Menlo Park, California-based Khosla Ventures led Square’s initial $10 million venture round in 2009 and participated in its second $27.5 million round this [...]

Keith Rabois has joined payment startup Square as general manager. He is an active angel investor in Silicon Valley, and previously held executive positions at Slide, LinkedIn and PayPal. Square is backed by investors like Khosla Ventures. www.squareup.com

Square, a payment service start-up, has launched with $10 million in venture backing from Khosla Ventures and a team of angel investors, Techcrunch reported. The company is already valued at $40 million.