with the image shack thing, it always sends me to the website when I click on my images, so it isn't quite as convenient as it makes out to be. I also found out , that there is a field in the "share images" page that you have to unclick if you want the whole image to show as opposed to a thumbnail.
I finally figured out, though, that the "direct link" url is the one you have to use for it to work at WC. so long as I copy that link, and put it inbetween the [ img ][ /img ] things.. it works just fine.
thanks all!