I've written about the destruction of Gindeung Maeul, the first part of the Banghwa New Town to go ahead, several times before:
Exploring Gindeung Maeul
The Disappearance of Gindeung Maeul
More of Gindeung Maeul being destroyed
Google Earth/Maps has a shot of the area that now shows the destruction from above:
Interestingly enough, it seems to correspond with this photo I took of the area on October 19, 2008:
As I pointed out in March, more of Gindeung Maeul is being destroyed (in fact, it's nearly finished). As it turns out, however, almost every non-apartment-dominated area abutting the Magok area (such as this neighbourhood) is being (or has been) destroyed to make way for the Magok development (Seoul's largest) and the lake park and marina that will be a part of the Han River Renaissance plan. I'll save a closer look at that for another day.