A number of us from the freenode #haskell channel have gone and formed/revived ##logic to avoid overwhelming the main Haskell channel with traffic. Originally, I just wanted to revive the #logic channel that was already there, but upon talking to the freenode staff, it appears that they have channel naming guidelines that preclude topical discussion channels getting single # names without some sort of clear trademark. They were however nice enough to forward the previous #logic channel to the new location.
In any event, if you are interested in logic at pretty much any level, feel free to stop by the channel.