The last time I published a lost dog plea on the E-FORUM, he was miraculously found and returned to his guardian. Hope this works again.
Incidentally, the newest gadget out there is a GPS tracking system for your dog. It will alert you if your dog leaves your yard and tell you exactly where it is. We put one on our puppy. See http://www.pettracker.com/pet-gps. It cost less than $100 from Amazon http://www.amazon.com/Tagg-The-Pet-Tracker-Master-White/dp/B0077I42S4. You will never lose your dog again.