Aero news network, aviation safety network, Flight Global, LAA forum, facebook, several type specific pages there. DH moth club e letter, Auster and Taylorcraft forums, NASA feedback email, AAIB monthly bulletin, Pprune occasionally.
I used to read Kitplanes before the internet came along.
These days I get some info from the EAA message board, some from here, but the overwhelming majority of my interaction with all things GA and EAB is through YouTube. If I hear of a new product, I want to see someone talking about it. If I want to know how to design an empennage, I want to see some pointy-headed intellectual talk me through the calcs on a grease board. If I want to see someone fabricate something.... video is worth a zillion words, and a million pictures.