alt Hacker NewsThis is a fun area, as the DMCA, for its flaws included a loophole for non-commercial distribution of live concert recordings. The only requirement is that it isn't an exact copy of a commercial release. I am not sure about the exact standards, as live albums often aren't the entire concert. Here are some other sites where people share these tapes.
Sugarmegs is up and running for 30+ years now. I knew the guy who started it back then and he was a Sony employee who "inherited" a T-1 connection that Sony forgot they were paying for... At least for the first few years, when content streams were now profoundly ancient real audio files.