A short column in Scientific American, by Darren Naish. He's unconvinced, and finds the evidence lacking.
"I do not think that the data we have at the moment – this includes tracks, hairs, vocalisations, photos, and the innumerable eyewitness accounts – provides support for the contention that Bigfoot is real, and have come to the conclusion that it is a sociocultural phenomenon: that people are seeing all manner of different things, combining it with ideas, memes and preconceptions they hold in their minds, and interpreting them as encounters with a monstrous, human-like biped."
http://blogs.scientificamerican.com/tetrapod-zoology/if-bigfoot-were-real/
I don't wish to offend with an article from a doubtful author, but do feel this will stimulate some worthy discussion!