Make fliers. Post them on mail boxes, power line posts, etc. That way for those who don't check the internet, they can give you a call if they spotted him.
Keep giving the HS and AC a call.
Does your dog have any tags with a phone #, his name, etc, on him? That would increase the chances of someone calling you if they found him.
Best of luck in finding your pet
I've had one or two that never showed up, while ones who got out for a bit were quickly returned.