I have updated it to limit the post size and/or image width. Basically, you set the max width and it will scale anything wider than that. The catch is that if you are not supplying the image size, it has to wait for the images to load before it can scale them, which is slow... I strongly advise including the image sizes for a faster user experience.
Methinks you owe me a beer for that! What a pain! Hope you enjoy it.