Kagan's Myths of the Current War has been referred by the WSJ today. Myth 5, "Most Iraqis 'want us out,'..." is the most interesting:

The real issue about the popularity of American forces is the degree to which their presence fuels the fighting or contains sectarian conflict.

This issue of Foreign Affairs also has a fresh analysis:

The current struggle is not a Maoist "people's war" of national liberation; it is a communal civil war with very different dynamics.