swfIR, Flash Image Replacement

Using the dark arts of JavaScript and Flash, swfIR gives you the ability to apply an assortment of visual effects to any or all images on your website. Through progressive enhancement, it looks through your page and can easily add some new flavor to standard image styling.

Interesting. I’ve thought of this myself, particularly with regards to images that need scaling (Flash has JPEG smoothing, which browsers to do not).