Great reading.
I think this story might have worked better as print than audio because I kept getting lost trying to pick up on the nanotech and other science-y words amid the vampire-killing action. I'd also like to know how the Lieutenant got to know Jay so that he could just say "let him in, Sergeant". It's almost Anita-Blake-ish in that way -- "I'm the biggest, baddest hunter around, so just let me in and save everyone some time, Mr. Posturing Asshole Cop Stereotype. Oh, what's that, Mr. I Understand The Situation Supervisory Officer? I can go in? Why thank you? Here's a sex scene for your trouble. Now me and Mr. I Act All Badass But Get Killed In Act Two Before The Big Fight Scene are going to go inside, along with Mr. Mysterious Former Military Guy and Mrs. Wife-of-Badass Who Sees Her Husband Get Killed But Goes On Doing Her Duty".
Sorry, I got carried away. But I think you get the idea. The story was good, but the hunters were a little cliche (other than J). The fact that I'm bringing that up probably means I couldn't find anything to nit-pick. YOU WIN AGAIN, ESCAPE POD!!!
Oh, and I think we all knew Jenny the Rock Climber would be a vampire. No real surprise there.
I didn't get the religion angle until I read it here. Though does this mean that the Ancients are really the dudes who were at the Last Supper?
Good one all around.