On the dun page it says "Duns- 1 cream (dilute) gene on any colour horse", buckskins and palominos (and smokey blacks, smokey grullas etc.) are the ones w/ the cream gene, duns have the dun gene!
If it was me I'd probably list all the cream delutes on one page (palomino, buckskin, cremello, perlino, even smokey black, etc.). Buckskin is actually closer to palomino then dun. I do realize the colors are called different things in different parts of the World, but I'm currious if they call buckskins dun, what do they call duns?
I know pretty much nothing about appaloosas, but I have had one, and he was a different color then any you have listed. He was kind of red w/ a roaned blanket (got whiter the closer you came to his butt), I always just called him a roan app. I lost most of my pics when we had computer issues, but I have a few not very good ones I'd be willing to let you use, you'd just have to find out the proper name for the color.
I have considered making a color website, I even have an album on my photobucket w/ the different colors, but most are horses I have owned so it's limited.