Actually I think Iomedae would be one of the more accepting gods(perhaps THE most accepting, excluding Seranae) of ANY creature, fiend, fiend-spawn, darklands-spawn, ect wanting to rise above their heritage and join her church. though as Kalindlara said they would probably be pressed even harder then the normal prospect if only to test their resolve and to insure no treachery.
Also just found this in my research:(aka a google search that lead to the "Ask James Jacobs" thread)
xavier c wrote:
1)How would Iomedae feel or react to a Cleric or other type of worshiper spreading her faith on the planet of Triaxus or Castrovel?
2)Would a kasatha or an android ever worship Iomedae?
1) She would support it. Again, spreading the faith is kind of the cleric or other worshiper's job.
2) Why wouldn't they? Iomedae isn't a racist, and neither is her faith.
His later reply to someone bringing up the ISG entry:
Fiendspawn does include tieflings and half-fiends and so on. Of course, those who are non-evil (as in the case of good-aligned or even neutral aligned) and thus are not evil are not loathed by her. The ISG book isn't in error—she does hate demons and their spawn... but the ISG book also maybe phrased that a bit too hyperbolic.
She hates evil things yes, but she does look at the bigger picture. She looks past birth to the person inside(This is why I HATE people trying to say she's a Lawful stupid stuck up b%*!!.) Her church SHOULD do the same, though in practice it likely has those who do and those who don't.