More to explore:
How to make a toothbrush rug. Excellent instructions with pictures.
Good instructions for toothbrush rugs / rag rugs
Crochet Rug - with instructions
Toothbrush Rug 2
My Toothbrush Rugs
Instructions for Locker Hook Rugs | eHow.com
Toothbrush Rugs - Complete Video Instructions (Part 1 - Beginners) | Rag Rug Cafe ragrugcafe.com/...
Detailed rag rug instructions using an old toothbrush whittled into a needle for braiding/weaving
square toothbrush rug
Another version and 'how to' for constructing a toothbrush rug.