You could use them to your patterns together like a paper clip. I always hate it when I am looking at instructions in a quilting book and I turn away to get the fabric or something and the book closes on me. ARG! So it would be a good book marker.
Since I am so short, I would use them when I had to hem my jeans or pants. At least when you used them you wouldn't have to keep moving the pins in and out the change the hem with. They also wouldn't bite you when you took the pants off, like straight pins do.
Just a thought...