I'm not exactly sure when that podcast linked to above aired as it's a compilation upload by the youtuber who figured he's hinting at Steem thus added the logo to the banner. But Joe Rogan did look at and talk about Steem and Steemit about 10 months ago: https://steemit.com/joerogan/@acidyo/steem-and-steemit-mentioned-and-discussed-on-the-joe-rogan-experience