Firstly I'd separate the status updates (or remove them completely if that's not what's required).
Secondly, I'm not going to give any answers, I'm going to give a load more questions.
Generally people who are good at something love to talk about themselves, what they do, their decisions and justifications and essentially the stuff that motivates them on a day to day basis. Do these guys have wiki's you can trawl to ask them relevant questions? Do you get one on one time with them to know what makes them tick? Knowing the individuals and knowing about the individuals would make the job of loosening these guys up a whole lot easier. Do they prefer a debate to a status update? If so, start a debate.
Do this in the morning or before lunch whilst people are fresh, not when they're knackered after a long week.
As these people are your stars, it is really important that you show them how much you value their time. Timebox the meetings, be extra diligent about it. Also if people are going over their problems/issues, ask what they're doing about it. Jot down quick reminders to yourself and in subsequent meetings, ask how it's going. Don't force everyone to speak.
If this meeting is a forum that you run, put on your moderator hat and take of your engineer hat. Offer no advice or contribution during the meeting. Drive the meeting agenda, keep things flowing. This is your chance to listen. Especially, bring to bear people problems or problems with the business. Leave the technical problems to the guys as they probably have that covered. Of course they can and will raise tech issues. But talk about How do you assess your staff? Is that effective? What can we do to improve knowledge of X? Should we rotate staff between our teams? Talk about the things that you find hard, not easy.
I thoroughly recommend not wasting peoples time asking them to prepare status updates or presentations on their area, etc. etc. If there is something you need to know or want to hear, ask that question. Clearly the status update is not being valuable to you. What is it you want to hear?
Hope that helps!