How to become a channel operator
How to become (or make someone else) a channel operator, for a channel you have registered: use the form "/msg chanserv op #chatroom nickname", for instance:
/msg chanserv op #agaric ben-agaric
This will op people in channels where you have this permission, which would seem to include unofficial channels.
For registered channels you have to be the one who registered (or maybe other things), and you need to be a registered user yourself.