This idea is more for the look than to block out light, but it sure is pretty! Lamps Plus used a metal iron work piece and hung is at the window treatment and I think it turned out perfect!
Windows ~ DIY Shades and Panels
diy roman shades - use drop cloth and purchase a table cloth, panels or bed sheet with your favorite pattern and add to the drop cloth....very inexpensive and all of your windows can be covered throught you home.
Window Treatments Idea Box by Suzy @ Worthing Court Blog
DIY Easy Dormer Window Treatment Step by Step with photos & a link to purchase the exact fabric if you want.thank you for this easy tutorial Julie at Less-Than-Perfect Life of Bliss: Easy Dormer Window Treatment.
Vinyl roller shades are a cheap window treatment, but aren't so stylish. This easy DIY roller shade project transforms the not-so-great into something special with just fabric, trim, & a few basic supplies.