Tricky, not sure where we could host it offhand. There are some hackerspaces in the area that might be into the idea of retro computers, though. NovaLabs in Reston (
http://www.nova-labs.org/blog/), Tech Shop in Arlington (
http://www.techshop.ws/, more of a for-profit workshop), and HacDC in DC (
https://www.hacdc.org/), which I was a member of up until recently.
If we turned it into a class about retro computers, it'd probably be easier to pitch. Hackerspaces are generally pretty open, though.
I hadn't heard much about the HDMI option, but that looks cool. His site seems dated though, as it seems to indicate that the Indivision MKii isn't complete. Where is it sold?