Here's the picture of the Toothbrush rug (36 "x 22") I finished last night. It is so easy and fast to do. Entire rug could be made in 1-2 evenings.
It uses a tool that can be made out an old toothbrush with a hole in the top - thus the name.
The pattern is from http://www.auntphillys.com/
but there are several free sites available too:
36" x 22" Rug made using Toothbrush Tool