I track Star Trek Fan Films and Fan Audio Dramas (which is what most producers of audio only drama call it). Many are distributed via itunes. See
http://startrekreviewed.blogspot.com/2009/06/247.html .
Since you are preparing a series and have not yet produced an episode, I would like to list your work here:
http://startrekreviewed.blogspot.com/2009/06/210.html under (5) (digits follow the letters (A) through (Z)