Surely the Phone Losers of America should be mentioned. The guy behind that, RBCP, maintained a series of electronic 'zines in the '90s, that talked about red boxing, beige boxing, and all sorts of phone phreaking topics. The PLA is still around to some extent nowadays with an online radio station where episodes of their various shows are played (and they sometimes do live shows), although a lot of their material is them prank calling people and businesses.