This does have problems too. Along comes the prankster who links to the page with http://example.com/123/disregard-us-we-suck-cocks

Or say you have http://example.com/321/service-prices for a company and someone starts to spread a link with http://example.com/321/see-our-overpriced-services.

Everybody with a native language consisting of more than ASCII chars is definetely used to spelling variations.

As a Finn I must totally disagree. I find it extremely annoying when people misspell names or pronounce them completely wrong. It is not so difficult to use the correct spelling and to find out how the name is pronounced.

I find it extremely arrogant and self centered for English speaking people to totally ignore the rest of the world. I think that most of the problems we have nowadays with multiple character sets and other internationalization/localization issues could have been avoided without the "English alphabet is enough for everyone!"-mentality.