This was my first PP listen, and I quite enjoyed the story. I agree with eytanz... the chronology shifts didn't really add much to the story, but then, I think they existed to break up what might have been a more boring flow. Stories that take place over a long period of years, I feel, can sometimes be a little blah.
One wonders what the acropoleans would do as servants to whatever race created them.
I liked the reading -- the reader's voice had the heavy finality that was needed for a story like this. If anything I felt he was a little too dispassionate at times, but then, the acropoleans were fairly dispassionate. Or, at least, Daneth seemed to be.
I also agree that this may not necessarily have been 'classic' horror, but elements were horror-ific enough. It did feel more like SF to me -- though perhaps as the printed word it was more horror-ific. Still, if it appeared in a horror publication, it's horror enough for me not to complain.
A good introduction to Pseudopod.
(PS: using horror-ific instead of horrific on purpose.)