OMG, hold on...deep breaths Are you actually serious? Did you actually read any of those links? So all these people posting about the chinese government are completely wrong? The issue isn't occurring anymore, I guess the "spyware" disappeared.
The guy declaring this was all spyware and hacking makes me laugh. His knowledge of botnets is very limited, and i am positive this was not the case. Even common sense would tell you that a hacker has no reason to intercept HTTP data and redirect Yahoo to the Chinese one, very far fetched. Not to mention the stereotyping he used by calling you a teenager only based on his perception of your intelligence. Can you say prejudice?
Well Yahoo is also reporting it as news: http://news.yahoo.com/s/afp/20071018/wl_asia_afp/uschinainternetitpolitics_071018195622
It's an OFFICIALLY TOTALLY LEGALLY HIJACKed by China authority for Baidu. Not only to yahoo but to Microsoft.com and Google too. It's Retaliation for U.S welcoming Dalai Lama. Read the news: http://www.cbc.ca/technology/story/2007/10/18/tech-china.html