Unfortunately there is no "notification hook" for when a queue/topic is created. The two options I'd recommend are to either use the service bus management API to periodically scan for new queues/topics, or better yet, set up a "notification topic" which your worker role instances can then listen to. Dropping a message into this topic can be another action performed by the "manager" process when it provisions a new topic/queue.
However, if you could explain the larger scenario of what you're trying to accomplish, I can't help but suspect that there may be a better way to accomplish what you're after. As after a period of time, all those topics/queues could present some management challenges.