A Wall Street Journal story on Twitter is fanning the flames of rumor today. The inevitable “people familiar with the matter” talk of $8 to $10 billion valuations, possible acquirers (Google, Facebook), and Twitter revenues ($45 million in 2010; $100 to $110 million this year). Evidently, those “people” don’t quite buy eMarketer’s rather aggressive ad revenue forecast. Over at Search Engine Land, Greg Sterling thinks Google – or Microsoft – would gladly pay $8 billion for Twitter. Matthew Ingram says, please don’t do it, guys, because Twitter’s focus and potential could be lost, even if it got access to much-needed infrastructure and other resources. Twitter’s showing some promising signs in building out its business model. Some ad inventory may be selling out, and it’s getting serious about data licensing. Could be it could make it on its own.