It's half article and half interciew and as such contains some good insights and some good pointers for podcasters.
How do you handle different voices in the narrative? 
While I enjoy doing character voices, we made an editorial decision not to do dialect for fear of sounding condescending or being distracting. Still, there is a need when narrating to somehow distinguish among the characters for the sake of the listener. To do that, I lighten my voice for females, and give each a slightly different shading. Males get my full range, from baritone to bass: the colonel commanding the helicopters has to sound more authoritative than the hospital resident. Good stuff. Full article here
