Again, we are sociologists, not church consultants. But in terms of the implications of our work for churches, the two key words are engagement and relationships. It can't just be programs or classes or handing them over to the youth pastor. Real change happens in relationships, and that takes active engagement.
But I would caution that emerging adults are smart about when they are being marketed to. So if the emergent church doesn't offer something genuinely different from what emerging adults have too much of already, they're not going to give it two seconds of attention.
Also, for those involved in University campus ministry, there are some interesting observations. Go check it out.