This looks like a great way to get a denim quilt done! Thanks for the idea. I can see using wof fabrics for the flannel for a 40" long baby quilt. If you wanted to make it a little longer you could add a border, top and bottom perpendicular to the strips. hmm got me thinking again oh no!
Here's a link to a log cabin baby quilt. I made one quite a while ago. Just make sure you have all 6 layers (2 fabric, 1 batting in each strip) layered evenly so you catch all edges in the seam.
http://www.sewvac1.com/Library/Quilt...structions.pdf