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Facebook's stock is on a tear today, poised to post its biggest one day gain since it went public in May. This comes a day after the company's strong third-quarter earnings report and, perhaps more importantly, its upbeat call with analysts in which CEO Mark Zuckerberg said flat out, "I want to dispel this myth that Facebook can't make money on mobile."

While Zuckerberg and his top execs stressed that Facebook is in the early days on this front -- it only started trying to make money from mobile in March -- they did share … Read more

PALO ALTO, Calif. -- Ben Horowitz, co-founder of Silicon Valley venture firm Andreessen Horowitz, told a crowd at today's Y Combinator startup school that running a company is a nerve-racking experience; that you shouldn't be fooled into thinking everything's been done; and that "every breakthrough idea looks like a stupid idea" at first.

"Sure we look for big markets and blah, blah, blah," Horowitz told some 1,700 entrepreneurs and aspiring entrepreneurs packed into Stanford University's Memorial Hall auditorium. "But we're all looking for a breakthrough idea. And by definition, … Read more

PALO ALTO, Calif. -- Facebook CEO and co-founder Mark Zuckerberg addressed an adoring crowd at Y Combinator's startup school today, speaking confidently about Facebook and describing a world in which people will share a whole lot more than they do now -- via Facebook and other social companies.

"It's sort of a social-networking version of Moore's Law," said Zuckerberg, who was interviewed by Y Combinator co-founder Paul Graham. "We expect this rate [of sharing] will double every year. ...So in 10 years from now, people will be sharing about 1,000 times as many … Read more

Yelp is taking aim at business owners that try to artificially inflate their reviews on the site.

The user-reviews site today announced today that it has launched a new initiative to root out companies that have made "significant attempts to pay for reviews." In the event it finds such attempts, Yelp will post a "consumer alert" on a company posting alerting users to the violation.

"We caught someone red-handed trying to buy reviews for this business," the alert reads. "We weren't fooled, but wanted you to know because buying reviews not only … Read more

Color Labs, according to a representative authorized to speak on the company's behalf, is not closing down.

But for now, that's about all that's clear at the chaotic startup that is Color. Even the representative who issued that statement said he's dealing with the press only because the person who held that job just left the company.

His statement comes after Venture Beat this morning reported that a Color vice president had sent an e-mail to employees saying that Color was winding down. "Last week, the Board and major shareholders voted to wind down the … Read more

Color, a mightily hyped mobile application that tried for more than a year to gain a loyal fan base, has finally decided to close its doors, according to a report.

The company yesterday sent an e-mail to employees saying that its board and shareholders last week decided to "wind down the company," Venturebeat is reporting, citing a source. That e-mail, which was not published in its entirety, didn't say when the company will officially shut down its operation, but it did ask employees to immediately cancel "any existing commitments."

Color made a splash last year … Read more

Looking to help jump-start a new era in annotating Web text, leading venture capital firm Andreessen Horowitz today said that it's investing $15 million in RapGenius, a startup that enables such annotations.

RapGenius was founded on the idea that rap lyrics needed explanation. And given that Andreessen Horowitz partner Ben Horowitz is a well-known rap devotee, there's an obvious hook that would attract the VC firm to help fund the startup.

"Given that RapGenius is a Web site where people explain rap lyrics, and given that my partner Ben is a noted rap fanatic, your first reaction … Read more

Twitter might be stuck with 140 characters per tweet, but that isn't stopping the social network from adding some additional functionality to its platform.

The company announced today that it has partnered with Nielsen on a new survey tool for advertisers. The feature is simple enough: users will find messages in-line with their tweet timeline asking them if they'd like to complete a survey from advertiser. If they agree to it by clicking on the appropriate button, they'll be able to complete the survey from within Twitter, rather than be redirected to another site. The feature works … Read more

When the "Father of the iPod" Tony Fadell unveiled Nest, the "learning thermostat" last fall, it was likely the first time anyone had ever thought of a thermostat as sexy.

Now, less than a year after the first version of the product arrived, bringing Apple style design and user interfaces to what had traditionally been one of the most staid home appliances, Fadell's Palo Alto, Calif.-based company today announced Nest 2.0, a slimmer version of the thermostat that was built to work in more homes and brings new flexibility and features to the … Read more