If you would like to participate or start experimenting, more information and support can be found on the official discussion board on Energetic Forum.
Eric has also made a whiteboard presentation explaining the technical details. It includes a description of how an AM transmitter works, how a crystal radio works, and how all this is related to Tesla’s wireless transmission. He also introduces the equations for calculating the design of your own coil and walks through the design process of two coils. There’s a total of 2 hours and 45 minutes of video! Also included in the package is a 303 page book in PDF format which consists of a compilation of all the forum posts, information, discussion, experiments and diagrams relating to the Crystal Radio Initiative for your convenience. Be sure to check it out on the Crystal Radio Initiative home page.