I mad my new chicken coop off the ground so the boogers don't have anywhere to really bunker down. There is hay in the bottom of my coop, but the girls dig through it during the day occasionally so i don't think many bugs will stick around. I also use DE in the run, I never had the roaches crawling around in the run, I might try and sprinkle some in the house next time I get a bottle as well!
I've heard good things & "bad" things about DE. Right now I'm on the fence about whether I should get some or not. There's a thread I came across today talking about the roaches. People were saying that cucumber peelings inside the bedding & cucumber water sprayed throughout the housing keeps the roaches away. I think they said that roaches are allergic to cucumbers or something along those lines.