Everyone involved in the amateur online audio community gets to Do Some Who or Trek.
In September of 2007, I played Mara, leader of a group of rebels, in Darker Project's fan version of Doctor Who.
Part One of "Doctor Who: Materia" is here to listen to, and Part Two is here to listen to, or click through to DP's Doctor Who page.
I played this character in an english accent. It was a fun character, because she was of "dubious morals" to get the job done.