I was afraid that I'd only be presenting vapor. The Atmega32U4 chips that my two boards require for Arduino compatibility are out of stock everywhere in the package I need.
Fortunately, Twitter came to the rescue. I was able to make a trade and I now have actual working boards. The only further hint I'll give is that, from a software pwspective, the two boards look just like an Arduino Leonardo.
My other Smackdown project uses a Microchip PIC, the enemy of the Atmega, so it wasn't affected by the shortage.
I love this 5-minute format -- in addition to being a co-host, I'm planning on giving one of the 5-minute presentations myself -- in fact I'm planning on three -- a different one each day -- unless we get too many other folks, in which case I'll gracefully yield the podium...