Microsoft
It's a tough one, having to follow the laws of a country you're doing business in when they run up against your principles.
He has an update in his article that MSN management has looked into it.
Rebecca argues that "the action was taken NOT by Chinese authorities responsible for filtering and censoring the internet for Chinese viewers, but by MSN staff at the level of the MSN servers."
Regardless of whether it belongs on websites (as opposed to the browser), I've replaced the white-on-orange "XML" button on my weblog with it.