Brent will be driving long hours through places with limited reception, so he may be slow to respond, but currently the best way to get in touch with him is email:
brent at brentrose dot com
He is hoping to find people to help with the project in ways ranging from acting as a guide at specific monuments to amplifying the signal and helping to get the word out. He will also be reading the comments and responding as much as possible at his Instagram account: @brentdangerrose