According to this post, http://briandeutsch.blogspot.com/2009/03/google-korea-youtube-korea-to-begin... ,
"Google, the world’s largest Internet company, has finally submitted to South Korea‘s unprecedented Internet regulations, including agreeing to implement a “real name” system in which any South Korean can post their contents only after they confirm their resident registration number."
Wikipedia have to response to this regulation.
Any site which has more than 100,000 visitors for a day have to implement real name system according to the regulation. We have to check the number of visitors from South Korea. If we have more than that, we have to decide if we will allow editing or not from South Korea.
It's a serious challenge for Wikipedia.
-Cheol