I'm confused, I didn't read until now that we are taking the last letter making it the first of the next.  Wouldn't that be a form of Renga? While not in the traditional sense but you are in effect answering and continuing the previous work. Also, just out of curiosity, is free form haiku okay? As I see 3-53 rather than 5-7-5. I enjoy the challenge, just want to be clear on the guidelines. I don't want to break the flow..Thanks......