HERE'S AN ENCOURAGING REPORT on the humanitarian situation in Iraq, though I don't know a lot about the sourcing other than that it comes from the UN. But they wouldn't be likely to paint a rosy scenario here. Excerpt:
Basrah - An UN inter-agency mission reached Basrah on 27-28 April, to carry out a humanitarian assessment and to identify office premises. In Basrah, the situation is improving but is still tense. Water and power supplies are provided at 90% capacity, and are expected to reach 100% shortly. This constitutes a higher level than before the war. UNICEF is in dialogue with local water companies to gradually take over the water tankering operations in the city. Garbage collection is problematic. All hospitals are functional and guarded by military.
These reports sound pretty good to me for the immediate aftermath of a decisive war.