Be careful what you write whilst on-line in China.  Yahoo
was accused last week of helping Chinese authorities identify and
imprison a reporter who described government fears about
pro-democracy activists.  Shi Tao of China's
Contemporary Business News attended a meeting at which an
official read a government memo warning of possible social unrest
during the 15th anniversary of the 1989 Tiananmen Square
massacre.  Using an Internet alias, Shi described the
government memo in an email sent to a U.S.-based pro-democracy
website, incurring the anger of Chinese authorities.

According to Reporters Without Borders, Yahoo's Chinese
division helped local authorities crack Shi's alias, leading
to his arrest, two-hour trial, and 10-year prison sentence. 
Google, Yahoo, and Microsoft are all competing for a share of the
Chinese internet market and all three come under criticism for
lowering ethical standards when it comes to free speech.  In
June, Microsoft fended off criticism for blocking Chinese
bloggers on its sites from using words like “liberty,”
“capitalism,” and “human rights.”