Steven Pinker's wonderful book "The Language Instinct" claims the the Sapir-Whorf hypothesis is bunk. It's not the strongest part of the book, but still well worth reading.

As a taste, Pinker tracks the evolution of the myth that the eskimos have more words for snow than English-speakers. He explains how this myth was manufactured by anthropologists who wanted to give credibility to Sapir-Whorf, and eventually took on the status of a "fact", appearing in textbooks and so on.

The Sapir-Whorf hypothesis, in a nutshell, is "language influences thought." The classic debunking example is the urban legend, "Eskimos have over a hundred words for 'snow.'" This is often overextended to imply, "...and so Eskimos must conceive of snow on a whole 'nother level, dude!"

But our non-Eskimo language doesn't fundamentally limit our capacity to comprehend the nuances of snow. We just add modifiers (e.g., 'wet' and 'fluffy') to "snow", instead of using a different word. And, actually, it turns out the Eskimos use modifiers, too.

The Language Instinct is a great read. Pinker's got a real talent for popular science writing that's accessible but not dumbed down. Check out his first hit, How the Mind Works, if you're interested in general cognitive science.

The Eskimo example isn't a very good one because English has lots of words for snow/frozen things, like glacier, frost, sleet, slush, etc.

yeah that sounds familiar. These sorts of things become self perpetuating as facts.

A few books on amazon have criticism of it, that is all I have seen. But no "mythbusters" episode ;)