Found a site that shows how to construct a fly with a needle..... Pretty interesting. Seems like it's similar to tying a tube fly, but with a regular household needle.
Making a Needle Fly
I'm not sure if I agree with using a treble hook, I would probably go with a caddis hook. But I can see that this would be a great way to tie a bunch of streamers to swing and only need a hook or two.