I just finished a shawl that I thought might be of interest. It's entirely hand-dyed, the warp in orange silk and the weft in 24 shades that fade gradually from fuchsia to electric blue, giving the appearance of continuous color change throughout the shawl. I posted it on Weavolution, at http://www.weavolution.com/node/4563 .
I've done some other work with the same concept (colors dyed so close together it looks like a gradual fade). I'm still working on getting all my work into Weavolution, but meanwhile you can see them here:
It's a neat concept, and one that I think is worth trying, if you have the time to sample and hand-dye all the colors. It doesn't take nearly as long as it sounds, since I dye in quart mason jars and you can fit 6-8 of them into a canner, so I can dye 8 colors at once. With 24 colors that's only three batches!
Here's one photo as a teaser: