So... have you guys heard of Branch? Might be a good tool to use to try and hash out this idea.
Anyway, my concept of the podcast is that I would serve as "host" and you two would be the "talent." We would connect via Skype and take great pains to be sure that every episode is exactly 18 minutes long.
I will identify topics for each (bi-weekly?) show and we would talk via Skype.