Pretty self explanatory, an auto-join list that updates itself, any channel you join will be added to your auto-join list, any chan you part will be removed, if you are banned from a chan on your auto-join list it SHOULD be removed, this may not work as different servers use different raw codes(its also possible I screwed up the raw event but blame the server first =D).

on *:JOIN:#:{ if ($nick == $me) {  if (%agetchans) && (!$istok(%ajoin. [ $+ [ $network ] ],$chan,44)) { 
      set %ajoin. [ $+ [ $network ] ] $addtok(%ajoin. [ $+ [ $network ] ],$chan,44) 
    } 
  } 
}
on *:PART:#:{ if ($nick == $me) { if (%agetchans) && ($istok(ajoin. [ $+ [ $network ] ],$chan,44)) { 
      set %ajoin. [ $+ [ $network ] ] $remtok(%ajoin. [ $+ [ $network ] ],$chan,44) 
    } 
  } 
}
raw 474:*: if ($istok(%ajoin. [ $+ [ $network ] ],$2,44)) set %ajoin. [ $+ [ $network ] ] $remtok(%ajoin. [ $+ [ $network ] ],$2,44)
on *:CONNECT: if (%ajoin. [ $+ [ $network ] ]) join %ajoin. [ $+ [ $network ] ]
menu channel { 
  Auto-Join
  .Auto Get channels
  ..$iif(%agetchans,$style(1)) On: set %agetchans 1
  ..$iif(!%agetchans,$style(1)) Off: unset %agetchans
  .Manual Control
  ..$iif(!%ajoin. [ $+ [ $network ] ],$style(2)) Clear $network channels: unset %ajoin [ $+ [ $network ] ]
  ..$iif($istok(%ajoin. [ $+ [ $network ] ],$chan,44),$style(2)) Add $chan to Auto-Join list: set %ajoin. [ $+ [ $network ] ] $addtok(%ajoin. [ $+ [ $network ] ],$chan,44)
  ..$iif(!$istok(%ajoin. [ $+ [ $network ] ],$chan,44),$style(2)) Delete $chan from Auto-Join list: set %ajoin. [ $+ [ $network ] ] $remtok(%ajoin. [ $+ [ $network ] ],$chan,44)
}
on *:LOAD:{ set %yn $?!="Add current channels to Auto-Join list?"
  if (%yn) { 
    var %server = $scon(0)
    while (%server) { scon %server
      var %chan = $chan(0)
      while (%chan) { set %ajoin. [ $+ [ $network ] ] $addtok(%ajoin [ $+ [ $network ] ],$chan(%chan),44) 
        dec %chan
      }
      dec %server
    }
    unset %yn
  }
}