This is a great initiative @metasj! And also a nice chance for CHT to chime in, join the fun 
I have suggested some ideas already at their Github repository:
- Humane Technology, the Center, Community and Awesome list
- Minimize and manage App permissions on smartphones
- Hackathon ideas related to existing Humane Tech projects
- Selectively erase browser cache and cookies using a whitelist
The first one is especially interesting: We could rally our community and find people to be on standby to offer background support to the hackers at the hackathon, e.g. to do some research and offer advise. We have all kinds of disciplines represented amongst our great members, and it is a perfect way to offer engagement on this forum as well as awareness at the hackathon on the purpose and mission of the CHT.
Maybe at the time we can offer them some of our apparel, that we designed in the CHT Artwork & Apparel Contest