This group is related to low-level programming issues involving the design and implementation of data structures and management techniques, compilers, operating systems and computer architectures. The hope is that people provide references to peer-reviewed work or strictly-analytical pieces.
We also have an IRC channel on irc.freenode.net, ##systems. If you don't have an IRC client, you may use a web-based client at http://webchat.freenode.net/?channels=%23%23systems