Trawling the blogsphere, I am seeing a lot of links to this article with the t.v. clip. The clip gives the results of an experiment which revealed just how filthy peoples' shoes really are.
Quite a few bloggers say they are being persuaded by this clip to go shoeless at home.
The article is less impressive. It quotes a number of dinosaur 'etiquette experts' who are determined to bury their heads in the sand and tell us that asking guests to remove their shoes is impolite. I really do get annoyed with these 'etiquette experts' who refuse to move with the times.