Here's some guesswork on Quora: http://www.quora.com/Twitter-Inc-company/How-much-did-Twitter-acquire-Posterous-for http://www.quora.com/Twitter-Inc-company/How

Here's some guesswork on Quora: http://www.quora.com/Twitter-Inc-company/How-much-did-Twitter-acquire-Posterous-for http://www.quora.com/Twitter-Inc-company/How-much-did-Twitte...