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.

The new Zune may not be an iPod killer, but it does offer a clean interface, great industrial design, HD radio, and a subscription model for music, making it significantly less expensive for big users.

The easiest way to figure out who the customer is in an online space is to figure out who is paying for the thing. Usually, the people paying are the customers. So on Facebook, the people paying are marketers. That makes them the customers. And it means we are the product being delivered to those customers.

Google did a great job hacking the Web to create search - and then monetizing search with advertising. And Apple did a great job humanizing hardware and software so that formerly daunting computers and applications could become consumer-friendly devices - even a lifestyle brand.

In spite of my own reservations about Bing's ability to convert Google users, I have to admit that the search engine does offer a genuine alternative to Google-style browsing, a more coherently organized selection of links, and a more advertiser-friendly environment through which to sell space and links.

Global warming, you don't win it. It's this weird steady-state issue that's going to be with us for a few thousand years.

Social media is itself as temporary as any social gathering, nightclub or party. It's the people that matter, not the venue. So when the trend leaders of one social niche or another decide the place everyone is socializing has lost its luster or, more important, its exclusivity, they move on to the next one, taking their followers with them.