Mark & Mike -
Not to blow you you guys' heads up too big, but I've been wondering why your podcast series works so well? There are lots of podcasts out there, but very few I can tolerate for more than one or two listens. Manager Tools really outshines the vast majority, especially for 'casts about management.
I thought about what makes these work so well and have a few ideas:
1. The content is superior. Most management advice is drivel and most management podcasts don't even do a good job of putting the drivel across. You guys have got the goods.
2. The sound quality is superior. I forget I am listening to an audio production. That is not the case in many 'casts, especially when one party is phoning in. I don't care how you do it, but the transparency of the audio is great. This makes a big difference -- other 'casts have great content but OK-to-mediocre sound that drives me away after a while.
3. Your relationship makes the whole thing work. If it was one person or one person with guest, it would be a different feel and a different relationship. Somehow, you two being great friends makes me feel like you're my great friends!
I don't know how much of it is deliberate, but I think you've got a good thing going.