I have never seen this block and I really like it...I am sorry no one signed up!:-(
True That's okay...I enjoyed working on it and playing with the different arrangements. Debbie Caffrey's book showed how to make a bunch of these blocks very quickly so you really can play around with it. It's basically a half-square triangle with an extra square on one side!
I have had that happen when I have offered a class. However...you have a beautiful quilt top done, so not all was lost! :-)