I have received my Dad's adoption records and have learned that Helen Parker was 29 years old on December 17, 1930 and unmarried when she gave birth. That would make her born in 1901. This is all the information I have on her, but I'm hoping that ultimately the DNA test finds her.
In the meantime, I've got six matches to my Dad's adoptive father. My brother has been yDNA tested and we're awaiting the results on the rest of the markers. With the Ancestry's release of raw data of my test, I'm feeling pretty optimistic that I'll crack something soon :)