I created also a IRC bot with python. I was surpised how simple the irc protocol really is. But my robot was very basic.�
I agree with Bernat, messy code is much more preferable than no code at all.
Sergi your plan sounds fine to me.
I think it would be a good idea to announce new pharo builds via a bot to #pharo. This is a common practice for all channels.�
#emacs has an excellent bot that even allow you to search through documentation. So much potential :)�