As the chairman of the Federal Communications Commission for the past three years, Julius Genachowski oversees the most complex broadband, cellular, and television landscape on the planet — and as carriers push to roll out 4G networks to new markets faster than ever, that means he's got a lot on his hands.

We're delighted to report that Genachowski will be visiting Vox Media headquarters in Washington, DC on Tuesday, September 25th, where he'll be talking about broadband challenges and opportunities in the 21st century starting at 10:30AM Eastern. But that's not all: Vox Media CEO Jim Bankoff and myself will be sitting down with him right afterwards for a roundtable discussion where we'll have the opportunity to ask a few questions. Best of all, we're going to be broadcasting the event live — we'll have a link to it front and center on The Verge on Tuesday morning.

And that's where you come in: we're going to select a few of your questions to ask him, so come up with your best and drop them in comments below. What would you like to know?