Engage has been sponsored by the Katoomba Christian Convention for 5-6 years. The intended audience is workers, as the Australians call them. I think we Americans would call them career-aged, or something like that–people after university and before family-life responsibilities.
The response is so great that Engage 2011 ran 2 separate weekends to accommodate more than 2000 people each weekend.
At the Desiring God blog, Johnny’s written a summary of what he had to say about glorifying God at work. Word is that it’s being tweeted and FB’ed all around Australia.