I've seen a pattern in various blogs, and have been wanting to try it for a few months. It's called the Disappearing Nine Patch, and looked like it would be very fast and easy. Sure enough, and I like the results! This was a Christmas Table Runner I made for the bazaar, and it turned out 25" x 54".
You start with a basic nine-patch block, and then cut it into 4 equal sections. Then you rotate two corner squares two turns, and sew the block back together. After making several blocks, sew them all together and add a border. This is the result: