Is Twitter a billion-dollar company? It is now, according to its investors. People familiar with the company tell me it has raised around $50 million in a funding round that values the start-up, which has no real revenue to speak of, at about $1 billion… Tweet This Post

ast growing startup Twitter will soon be joining a select group of startups with private venture round valuations of $1 billion, we’ve heard from multiple sources. CEO Evan Williams disclosed the round to employees at a recent all hands meeting… Tweet This Post

Nokia is set to announce today that it has acquired Plum Ventures, the San Francisco “microsocial networking” start-up, for an undisclosed amount, sources said… Tweet This Post

A few weeks ago , we reported that Yahoo quietly launched its microblogging product Yahoo Meme, in Spanish. Yahoo had previously launched a Portuguese language micro-blogging product, Yahoo Meme, that drew similarities to Twitter and Tumblr. And on second glance, it seemed to be a mediocre competitor to Twitter, Tumblr and other micro-sharing services in [...]