I'm not sure how frequently people send information into the website, but wolfdog.org maintains a list of dogs with working/sport certificates/titles. From these dogs, you can follow lines where the titles align amongst generations.
http://www.wolfdog.org/php/modules.p...e=certificates
I think it's important to remember the point of evolution the breed is at - it is difficult to come by a high level of homogenity in many litters, especially in cases where breeders are trying to maintain a good level of genetic diversity. None of our "lines" are but so diverse from one another, certain relatives can be found in all dogs - many other relatives can be found in high percentages within the breed within 4-5 generations.