the cluetrain manifesto (spelled in E. E. Cummings style) is a World Wide Web site, http://www.cluetrain.com/, that evolved into a book by Rick Levine, Christopher Locke, Doc Searls, and David Weinberger and published by Perseus Books (ISBN 0738204315). The book's thesis is that the Web is not a medium, it's a conversation --

"...companies so lobotomized that they can't speak in a recognizably human voice build sites that smell like death."
—"Fear and Loathing on the Web", The Industry Standard and CNN Interactive

The Web site "nails" 95 theses to the "door" that challenge out-moded twentieth century thinking about business in light of the emergence of the Web.

It takes its name from this quote on the cluetrain web site:

"The clue train stopped there four times a day for ten years and they never took delivery."
— Veteran of a firm now free-falling out of the Fortune 500