With the Morph ability making a come back in Khans, I did some digging. I thought that I would post my findings here:
http://archive.wizards.com/Magic/magazine/article.aspx?x=mtgcom/feature/87
Mainly, I did it cause I wanted to know about responding to the flipping for the morph cost. Which, you can't. It doesn't use the stack. So, yay.