How can I get IRC Colloquy to catch up history of a channel when I reconnect? How can I get colloquy to catch up history of a channel when I turn back on my laptop? 

I assume its something like leave a bot in the room.

Thanks, Martin.

PS. Perhaps someone would make the tags irc and colloquy for this question?
A friend just said: 


  I'm on a Mac but I shell into a remote server and run irssi in screen, most
  people I know do that.  The second most common, and what I think you
  are looking for is: http://wiki.znc.in/ZNC