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

Google’s dominance of the Internet in the United States is hard to overstate. The company accounts for two-thirds of all Web searches, it owns YouTube, which is 10 times more popular than its nearest competitor, and it is No. 1 in areas like maps and blogging. Overall, U.S. Internet users spend 9 percent of their [...]