Nikon still hasn't shipped a filter adapter for the 8800. So, a couple of weeks ago I ordered one from Nextphoto.
They have several sizes, plus lens caps to fit those sizes. I ordered the 58mm adapter. Unfortunately, my filters wouldn't screw on tightly -- just kept going around.
I called Nextphoto and was told that they had had some problems with that particular (58mm) adapter, and that they would send me a replacement.
Has anyone else had experience with Nextphoto?
Since the filters stayed on the adapter (just remained loose) I went ahead and took some comparison shots with and without a circular polarizing filter. I'll post them here.
Below is an Audi A4 shot without a filter. Notice the sun's glare off the car.