The Genetic Genealogist Blog may be of interest to those who would like more information about the relationship of genetic testing and genealogy research. On his About page, the author explains the four types of genealogical DNA testing and his approach to the subject. The blog may be great place for keeping up with what's new in the field and what's being talked about. The blog this week compares the types of DNA testing done on a recent episode of the "Faces of America" program, currently airing on PBS. It's a chance, perhaps, to gain a greater understanding and know more about what's possible as this exciting new field expands.