Interesting. I have done this on a couple of occasions, maybe not this exact model but close.

One approach would be a Speakers Bureau. Another would be to structure it as a full service agency or as "full" as your colleagues' backgrounds permit. Be sure to create a vesting schedule, even sweat equity can get away from you if one is not careful (says the voice of experience).

A third option would be an equity crowdfunding startup. indiegogo has partnered with MicroVentures to offer the JOBS Act of 2012 based solution for US based companies.

I would enjoy sharing some war stories or answer any pointed questions at your convenience, let's schedule a time.