Sam's plans seem less activism-related at the moment and more working on his own private stuph so I think your best bet is to just stay tuned to FTL, Free Keene, and stuph like that. When he has something he wants to share, I imagine he will do it there, but don't expect too many updates or I imagine you'll get frustrated.
I don't know how you searched an audio podcast for Sam. That sounds hard to do unless you have some software I don't know about. If you mean in the show description, I don't think it tends to be as specific as to list specific callers.