Kimberly ThorpeThis American Life's Ira Glass signed books and DVDs for Mayborn'ers late into the night Saturday in Grapevine.For Ira Glass, the 50-year-old host of Chicago Public Radio's This American Life, doing radio is like talking on the phone to somebody late at night. "There's an intimacy to just hearing someone's voice," said Glass, Saturday's keynote speaker during the University of North Texas's fifth annual Mayborn Literary Nonfiction Conference. He began his address with the light
