I'm working on a startup called Longform, which helps book conversations between people and various organizations and, with the consent of both parties, forwards it to podcast feeds of both parties. One of the projects I've considered is creating a marketplace of other voices you can use, and directly stream that over the call. The primary motivation was to remove some apprehensions about hearing your own voice, help with anonymity, make them more comfortable with marking the material public, etc. Also its pretty whimsical so that's always good