Where have all the cypherpunks gone?
A few relevant mailing lists:


cypherpunks@cpunks.org
cryptography@metzdowd.com (moderated)
cryptography@randombit.net
liberationtech@lists.stanford.edu


Other crypto mailing lists with a narrower technical focus:


messaging@moderncrypto.org
curves@moderncrypto.org
cfrg@irtf.org
tls@ietf.org