The newest episode hasn't been posted yet, but Darren Grey just announced it on his Twitter feed. When it appears, of course, it'll show up on the Roguelike Radio blog.
@Play 82 is still in the works. Doing something on all the Nethack variants turned out to be too big a bite, so I'm looking into ways to usefully lessen the scope. Please stand by.
But not literally. You might get tired.