Update (3:30 PST): Simon & Schuster just announced it was cancelling Yiannopoulos' upcoming book Dangerous. In addition, Breitbart is considering dismissing him as Technology Editor.
A few minutes ago, Matt Schlapp, Chairman of the American Conservative Union, announced on Twitter that the recent invitation to Milo Yiannopoulos to speak at the upcoming Conservative Political Action Conference (CPAC) had been withdrawn. Schlapp explained that this was due to Yiannopoulos appearing to endorse pederasty in a podcast interview about a year ago. Yiannopoulos had recently issued a "clarification" of the interview on his Facebook page, but Schlapp dubbed this "insufficient."
A few hours earlier, CPAC had announced that President Donald Trump would be speaking at the conference.
WARNING: GRAPHIC. Here is the long original version of the podcast (some of he relevant remarks begin at about 1:01:30). Yiannopoulos' "clarification" is here.