I did the Ribbon Puzzle block from quilterscache.com:
http://www.quilterscache.com/R/RibbonPuzzleBlock.html
This was only the 3rd large quilt I had made.....almost 5 years ago now.
The pattern is a bit different from yours as they ribbons are not made from individual blocks, but I did scallop the edges (and did a cross hatch quilting on the border).