Hi Robert,
As a practical matter, its no secret that I don't have a personal need for anything outside the realm of cp437. That said, I visited your link and read a good bit of his thesis and was initially impressed with his ideas. But it was the replies to his blog that I got the most amusement from, especially this one:
The good news is that GB18030 is very similar to UTF-8 (including the first 128 characters that your source code is typed in) and therefore there is no sound logical reason to not use GB18030 unless you are a racist (although I believe racism is the exact reason why you can’t run a Chinese program — menu items and all — in a typical English version of Windows).