"According to a report released Monday by antivirus company Sophos, China, including Hong Kong, hosted 44.8 percent of the world's infected sites in August 2007."
One of the bad things about being infected from a Chinese site is that a half-hour later, you're not sure if you got infected or not.
I almost got infected from a Chinese site once-- they tipped it off though when I was offered 'one exploit from column A, two from column B'.
I hear 'Malware Vectoring' is going to be a trial sport at next year's Summer Olympics.