Digital anthropology is the study of the relationship between humans and digital-era technology, and extends to various areas where anthropology and technology intersect. It is sometimes grouped with sociocultural anthropology, and sometimes considered part of material culture. The field is new, and thus has a variety of names with a variety of emphases. These include techno-anthropology, digital ethnography, cyberanthropology, and virtual anthropology.
A fellow researcher has compiled a good list of key concepts in the area.
Here is a compiled Twitter feed of relevant, prominent academics.
Finally, some of my relevant blog posts are tagged under digital anthropology.