It appears the mother of all surrenders is underway as described in this article from Reuters. Here's an excerpt:
Reporting from central Iraq, south of Baghdad with the 1st Marine Division, [ABC correspondent Mike] Cerre said U.S. support aircraft had counted more than 60 buses filled with Iraqis fleeing Baghdad.
"What is stopping us now is the flood of deserters and civilians, on buses, trucks, taxicabs and whatever they can catch a ride on, trying to make their way south to their families or American forces to surrender" he said.