I found out about the amazing Pop!Tech conference last year when browsing through the archives at ITConversations. I was surprised that a full set of recordings of this fascinating (and expensive) conference were available for free. I still remember listening to Malcolm Gladwell telling stories taken from his then-unpublished book, Blink.
This year, if you want to be one of the first to get the audio files, you have to pay for them; $5 per session or $100 for the whole set. Otherwise, you can wait as they post them to their free archives over the next few months.
There’s a third option, though: listen live while the conference is going on today (Friday), Saturday, and Sunday. If your schedule permits, I recommend it.