peHUB First Read

Why He Stepped Down: Being CEO is "kind of a sucky job," says Twitter's Ev Williams. And, Twitter mulls raising new funds with a $3 billion valuation likely. Who Leaked: Warner Bros. wants to know how the first 38 minutes of the new Harry Potter movie appeared on the Internet Monday. They claim it wasn't a PR stunt. McRib's Return: Why it doesn't matter if you don't like it. Prince of Silicon Valley: Frank Quattrone, who took Amazon and Cisco public, tells entrepreneurs to be wary of going public. What? Biggest IPO: GM returns from the dead and prices its IPO at $33 a share making it one of the largest IPOs ever. Separately, why you should not invest. Mystery: Facebook and Myspace are going to make a joint announcement later today but it's not a merger. Another Farmville: Zynga chooses Facebook to launch its next game, CityVille.