Thought I would share some possibly useful information. I got my amsteel in the mail, and after trying to explain to my fiance why I was so excited about rope, I began the search for a fid to make some whoopie slings and whatnot. I didn't have any wire around the house that was thin enough, but I did come across some Curler pins. They are like bobby pins, but a little longer and without all the "bends" in it, so they are smoother.
I found these excellent as a fid. I slid the rounded end through the center of the rope and then put the end I wanted to pull through into the rounded eye and it worked like a charm.
So I learned how to make all kinds of awesome stuff with amsteel, and what a curler pin was. Solid day chock full of education.
Curler pins. Also available at any drug store for a couple dollars.