Pictured Above: Satellite imagery of civilian houses damaged by shelling
UPDATE: Google Earth has updated their imagery in this area.
Stratfor Global Intelligence has posted a report featuring Digital Globe satellite imagery of the damage inflicted on Yonpyong Island. You can download the PDF of this report here.
I have created a Google Earth overlay containing all of this imagery that you can download here (KMZ). This places all of the pictures used in this report onto Google Earth (where the imagery is not as clear).
DigitalGlobe has also made an image of Yonpyong available for a free download here.