I have made this pattern called a "circle Jean quilt". The pattern can be found at :
http://www.straw.com/equilters/libra...gallbaros.html
It went together fairly easily, but I would recommend a heavier needle, and strong thread. I put mine together with a zigzag stitch.
I have also made a rag quilt out of jeans, but you should use a scissor with a spring in the handle so your hand doesn't get fatigued.