I found some time tonight to write something up. It's here: Delaware Valley Charities: The Wagner Free Institute of Science and the Brandywine Valley SPCA. (I also replied with the link in the comments of the weekly-challenge post.)

I also shared it on Twitter and tagged the respective accounts for each of the two charities.

Thanks for the writing challenge. I think this sort of initiative could be a great way to bring users and attention to the blockchain.