NOTE: The slogan in english means: "interviewing inspiring entrepreneurs"
For the business cards I would like to use colored backgrounds if possible. Don't limit yourself to the classic white business card unless it is totally the best way to show the logo.
The concept I was thinking about was about the man on a lion, a vague idea of the concept is attached. Here's the quote of the concept:
Toby Thomas, CEO of EnSite Solutions (No. 188 on the Inc. 500), explains the phenomenon with his favorite analogy: a man riding a lion. "People look at him and think, This guy's really got it together! He's brave!" says Thomas. "And the man riding the lion is thinking, How the hell did I get on a lion, and how do I keep from getting eaten?"
So I think something with a strong and fearce lion face, silloute or whatever could work along with the face of a man. The man has to appear to be in control although if someone told you that the man is actually worried/doubtful then you could understand that as well from the image.
The person doesn't have to be on top of the lion, that's just an idea, they can be face to face or it can be a front show of a lions mouth and a person on top of the head or something, also, you don't need to show the full body of the person nor the lion. However it could appear to be choking the Lion.
These are just comments to explore.
You might add a microphone as this is a podcast but not required. I was thinking maybe as a concept a microphone sketch in the middle between the silhouette of a face of a lion and the silhouette face of a human.
Just an idea.
Thanks and good luck.