UPDATE: So I wasn't happy with just making the image a background-image, as it could be very difficult to see the text at times. I played around with a high opacity, and I think there might be something interesting there. However, to get opacity to work on a background-image without affecting the other children in an element, you need to do a pseudo background-opacity hack. This is fine, but in order to do it on a per-post basis, it's going to take a bit of messing around. I was trying to get a CSS-only solution, but it looks like I am going to have to use some javascript; and if I am going to do that, it might be worth doing a grayscale on the images, in order to make it less jarring. At any rate, this is kind of fun. I am going to play around with it some more.
