:thumbup: Denim rag quilts (made from old jeans) are very popular right now. Use flannel for the back and you have a very warm, soft quilt! Here are a couple links to get you started:
http://www.straw.com/quilting/articles/bluejeans.html
http://quilting.about.com/b/2007/09/26/how-to-make-a-denim-quilt.htm
http://www.mormonchic.com/crafty/denim_quilt.asp
Have fun!