Since the 1960s, mainstream media has searched out and co-opted the most authentic things it could find in youth culture, whether that was psychedelic culture, anti-war culture, blue jeans culture. Eventually heavy metal culture, rap culture, electronica - they'll look for it and then market it back to kids at the mall.

It feels as if ever since the iPhone was released, the Macintosh computer has become just another leverage point in this other operating system's marketing plan.

Microsoft's new OS, Windows 7, may finally be a worthy successor to XP, eliminating the clutter of Vista and letting users get to what they want to use without the fuss. All this, while remaining compatible with their IT departments' demands for scalability and custom implementations.

The competitive advantage professional journalism enjoys over the free is just that: professional journalists, whose paid positions give them the time and resources they need to commit more fully to the task. If we can't do better, so be it.

We Facebook users have been building a treasure lode of big data that government and corporate researchers have been mining to predict and influence what we buy and for whom we vote. We have been handing over to them vast quantities of information about ourselves and our friends, loved ones and acquaintances.

The true end users of Facebook are the marketers who want to reach and influence us. They are Facebook's paying customers; we are the product. And we are its workers. The countless hours that we - and the young, particularly - spend on our profiles are the unpaid labor on which Facebook justifies its stock valuation.

Like civil-rights protesters who sang rousing hymns as they were carried off to jail, Twitterers are bearing witness to what's happening around them, and calling out into the darkness of cyberspace for confirmation. I'm here. You're here, too. We are present.