This is something that I just put together, the result of about 6 months of mulling over the concept. This site explains just what CGDL is, showcases the gradient server rendering engine (all the gradient color fades are generated from CGDL), and incorporates a CGDL editor that lets you create and edit CGDL strings.

Please check it out and let me know what you think. And if you look at the source, you'll see some other clever tricks that you might want to discuss as well.

I am also considering the application of CGDL to print, video, flash, desktop apps, OSs, etc. Pretty much anywhere you can use a gradient fade.

Thanks!