I'm pretty sure someone already made this, or a lot of you used this before, but anyway :]

This is just an alias that echoes users that are sharing channels with you, aka $comchan users :]

I needed this for something, so I thought to myself "why not share it" :P

alias shared {
  echo -a :: Shared users for $active :
  set %gch 1
  while (%gch <= $chan(0)) {
    var %j $nick($active,0)
    while (%j) { 
      if ($nick($active,%j) ison $chan(%gch)) && ($nick($active,%j) != $me) && ($chan(%gch) != $active) {
        echo -a on $chan(%gch) : $nick($active,%j)
      }
      dec %j 
    }
    inc %gch
  }
  echo -a :: End of shared users for $active :
}