CAC, PCGS, NGC, ANACS, and ICG all have Facebook pages, also my favorite The Coin Show (podcast radio show) does as well.
I've friended a few above listed, as most everyone that knows me, knows I collect, I don't keep anything valuable at home and am armed. Those that don't know, hope they never find out! I also filter out and stay on top of my FB feeds. For my other hobby (astrophotography) Facebook is a great way to see new objects and share eachothers setups and techniques. With coin collecting I don't think Facebook could ever replace a fun knowledgable place like CCF anyways.
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013!
ANA Life Member #3288 in good standing since 1981, ANS, Early American Coppers Member (EAC), Colonial Coin Collectors Club member (C4), Conder Token Collector Club member (CTCC), Civil War Token Society (CWTS) member, Liberty Seated Collectors Club (LSCC) & Numismatic Bibliomania Society member (NBS), USMex, Member in good standing, 2¢ variety collector.
See my want page:
http://goccf.com/t/140440