eLearning Challenges-Posting

Hi,

I was really inspired by the article on participating in eLearning Challenges. I thought the article said they are still open to share your demos. I found a few to work on but when I go to add my project, I don't see the comments section to do that. For example, I created a demo for challenge #272, but I don't see how I can post it. 

Am I missing something?

Thanks,