Nice graphic work from the NYTimes.com Interactive folks.
Assessing the ‘Surge’: A Survey of Baghdad Neighborhoods
To study the ground-level effects of the American troop buildup, reporters and video journalists for The New York Times visited Baghdad's neighborhoods, interviewing residents, Americans on patrol and Iraqi officials.- link -
UPDATE: Doc points us to a related article
At Street Level, Unmet Goals of Troop Buildup
(Also contains a link to the full NY Times interactive map.)