Check out the picture at the top left. This guy is an independent who managed to get elected despite being opposed by both liberal and conservative media in the country. He is very much a product of the internet. He is a Howard Dean who made it. The traditional sources of power in South Korea are nailing this guys ass to the wall because he is an outsider. Of course, he is not without fault. He would have avoided impeachment if he had agreed to apologize over some technical elections issue. He refuse to do so, and so they booted him. Of course, its entirely possible that the call for an apology was literally an attempt to put him in a catch 22 situation where if he agreed to apologize he would be admitting wrongdoing and would be subsequently impeached anyway.
All in all, you can chalk this up next to Dean's implosion as a failure of the new media to challenge the present world order.
President of South Korea impeached