Business Week leads on business blogging which it says is the most significant development since the Internet itself took off in the mid nineties. In a useful survey. The article stresses that business people should get blogging yourself, using GM’s Bob Lutz’s Fast Lane blog as an example.

From Market Sentinel‘s perspective, this is the most telling section:

Blogs are different. They evolve with every posting, each one tied to a moment. So if a company can track millions of blogs simultaneously, it gets a heat map of what a growing part of the world is thinking about, minute by minute. E-mail has carried on billions of conversations over the past decade. But those exchanges were private. Most blogs are open to the world. As the bloggers read each other, comment, and link from one page to the next, they create a global conversation.

Picture the blog world as the biggest coffeehouse on Earth. Hunched over their laptops at one table sit six or seven experts in nanotechnology. Right across from them are teenage goths dressed in black and thoroughly pierced. Not too many links between those two tables. But the café goes on and on. Saudi women here, Labradoodle lovers there, a huge table of people fooling around with cell phones. Those are the mobile-photo crowd, busily sending camera-phone pictures up to their blogs.

The racket is deafening. But there’s loads of valuable information floating around this cafe. Technorati, PubSub, and others provide the tools to listen. While the traditional Web catalogs what we have learned, the blogs track what’s on our minds.

Why does this matter? Think of the implications for businesses of getting an up-to-the-minute read on what the world is thinking. Already, studios are using blogs to see which movies are generating buzz. Advertisers are tracking responses to their campaigns. “I’m amazed people don’t get it yet,” says Jeff Weiner, Yahoo’s senior vice-president who heads up search. “Never in the history of market research has there been a tool like this.”

These are the conversations that drive Market Sentinel’s “BuzzMapsTM”.