At Davos I managed to catch Juliana Rotich , Co-Founder of Ushahidi , the incredible crowd sourcing platform which came out of Kenya. Starting with just a handful of countries in 2009, it’s main product, Crowdmap , is now used in hundreds of countries for crisis mapping and even crowd sourcing information about nuclear weapons in Iran.

The Wall Street Journal has just reported that Facebook may file for its long-awaited IPO as soon as this Wednesday, but notes that the “timing is still being discussed”, according to an anonymous source. The article says that Facebook is eyeing a valuation between $75 and $100 billion as it raises up to $10 billion, which is in line with a previous WSJ report last November

After writing for NBC’s Parks and Recreation for the past couple years (he’s about to start a writing gig for HBO’s Eastbound and Down ), and authoring the sarcastic but brilliant and hilarious @HumbleBrag , Harris Wittels has decided to bring his talents to TechCrunch.

The Gillmor Gang — Dennis Crowley, John Taschek, Kevin Marks, and Steve Gillmor — visit with the ghosts of Foursquare Past, Present, and Future. @dens is semi-bicoastal these days, trying to stay ahead of his growing business.

Earlier this week, Facebook announced changes to its Open Graph which have huge implications to the social ecommerce platform Payvment .

At this point in his career, it’s safe to put John Earner in the “names as destiny” category. Following a hugely successful run with Playfish , he’s leaving the social game developer today to start as an entrepreneur in residence at one of its investors,  Accel , according to sources. A former naval officer, he joined as the company in 2008 as its first game producer, where he shepherded the development of its first big simulation game, Pet Society.

Y Combinator alum Curebit , an online customer referral platform that leverages social media for “word-of-mouth” advertising, has just raised $1.2 million in funding.

HP’s had quite a 2011 and Jon Rubinstein, former Palm CEO and a top-level executive at HP after the giant acquired Palm in 2010, was along for the ride. But according to a report out of AllThingsD , Rubinstein has officially left the company. Here’s the official quote out of HP: Jon has fulfilled his commitment to HP

Jeff Clavier  just finished raising  $55 million  for his third SoftTech VC  fund and after closing it out, stopped by TechCrunch to tape Founder Stories with host Chris Dixon . In part II of this  Founder Stories conversation, Dixon surveys the seed stage landscape and comes away wondering if too many unproven entrepreneurs are running companies with unrealistically high valuations. He believes it gives pause to investors thinking about backing these budding startups. As a micro-VC, Clavier says he manages this trend by clearly defining what he wants out of any partnership and if there’s not an agreement on the table he wastes no time analyzing the next opportunity

Wisdio , a social QA site like Quora, has decided to up the social QA ante by adding something they’re calling WAR – Wisdio Authority Ratings. These ratings allow folks to recieve answers from authorities on their subject of choice, thereby reducing the number of incorrect answers and, one would hope, increasing the utility of the site. Founded by Sebastian Zontek, Wisdio aims to help “find the right people to answer questions quickly and reliably,” not unlike many of its competitors.