One of the more fascinating ideas to emerge in military circles of late is the concept of the Human Terrain System, which is "designed to address cultural awareness shortcomings at the operational and tactical levels by giving brigade commanders an organic capability to help understand and deal with 'human terrain'-the social, ethnographic, cultural, economic, and political elements of the people among whom a force is operating."
In practice, this system entails recruiting and deploying anthropologists as part of small teams deployed with forward-operating forces.
Now, one of the first anthropologists being deployed to Iraq has started a blog where he plans to talk about his experiences in Iraq. I would suggest reading several of the entries for context, but here's an excerpt:
This broader idea, which has been written about in the New Yorker (there's also a good San Francisco Chronicle article here), has sparked considerable debate among anthropologists. Some though not all of this debate evokes the Pentagon's Vietnam War-era social science research, including the controversial Project Camelot (this project, though it may have received the most publicity, wasn't necessarily representative of the broader push into the social sciences).
There's a lively debate now about the ethics of anthropologists working for the military. The latest issue of Anthropology Today, for example, includes a critique of "mercenary anthropology" by Roberto J. González (and responses from David Kilcullen and Montgomery McFate).
In either case, this will be an interesting area to keep an eye on.