liberationtech seems good; p2p-hackers was ok for a while. the old cryptography list was ok in a couple of the incarnations. cypherpunks before the great decline is still my gold standard, though. (remops has been ok at times; some of the digital gold lists were also interesting).
The p2p-hackers channel was also interesting around the same time. The fact that you have to differentiate between the "old cryptography list" and its newer incarnations is sad. I think with each move the list went down hill. It seems half the posts to cryptography are either cc'ed to cpunks and a bunch of other lists or the message is a conference announcement.
When I get bored/nostalgic I will search gmane for one of the prolific mailing list subscribers like Eugen Leitl or that Vladis dude from VT. I found liberationtech via Eugene.
