Speaker after speaker at the AT&T Relevance Conference shared insights, ideas and strong points of view about the state of the media and advertising industry. Kirk McDonald hosted the event for Xandr, the newly christened advertising unit of AT&T. Below are comments made by industry leaders from Silicon Valley and Hollywood, as well as Madison Avenue buyers and sellers and successful content providers and distributors. Also speaking were Derek Jeter and Issa Rae, whose comments can be read here. The conference provided an excellent overview of the state of advertising, media and marketing from a wide spectrum of perspectives.