Here is the finished hat, all dyed. It took forever to dry, at least a few days, and when it was dry I discovered to my dismay that it had shrunk! Hence the lack of pictures of the hat actually on my head.
The colors faded in some spots and I didn't rinse it quite thoroughly enough so you may be able to spot a few curry flecks here and there. All in all, not my most successful experiment...but at least it was fun!