Me too! I was all concerned that it would be a flop project if the curl wouldn't come out. After steaming I boxed it front side in...and unrolled it to switch the starting side a couple times last night. This morning it is softer, nice and flat and shows no signs of re-curling :) I am so relieved!!
For a pillow I will probably stitch a muslin lining over the back, then make a case of canvas...I am not sure if I will add a zipper, or just a fold over. Probably a fold over though, because zippers get weird after a few years and washes.