I have used patches of corduroy in a quilt that was otherwise cotton, and it looked pretty cool. The quilting was SITD, so I didn't have to deal with getting across the thick seams, which might have broken my needle. Since I was using a mix of fabric weights (some so light that I had to put fusible on the back to make them less transparent) I couldn't use a heavy needle to quilt. I think a denim and corduroy quilt would look very cool.
Alison