SSStiches, that is a very pretty quilt.
I, also, have a bunch of yo-yos that I have made over the years while sitting in the doctor's office or while waiting for something. I'm not sure what I am going to do with them either. I did see a picture of a quilt where the yo-yos were stitched on the block seam, in between the blocks, using them like they were sashing. It was quite pretty, as each block was a large centered applique and a lot of space around it. The background was muslin and the yo-yos were all different colors, sewed down the seams and it made quite an eye-catching quilt. I wish I had a picture to show you.