Here's what I did with the alpaca yarn in separate striping: the "Leftovers" pattern from Knitty. I used a bit of the green yarn at the top and some handspun I bought from someone else at the bottom (I can't wear orange near my face, but on the ribbing at the bottom, why not). That pretty much explains the weird hot-to-cold striping, what the hell.
I still have leftover greens and blues, which kind of annoys me, but oh well. I wanted to make sure I had enough to finish off the top.