http://www.wormspit.com/blog/2007/06/21/copper-tablet-weaving-loom/
Another interesting variation to using copper pipe pieces for loom components.
I've also made a beading loom using the copper pipe--here's my beading loom:
The nice thing about using copper pipe is that it's easy to find, not too terribly expensive, easy to cut with an inexpensive pipe cutter and looms can be made in a short time. I have about 15 of the small frames for tapestry now.
