Most Kos readers who want to keep up with what's happening in Iraq will probably already know about Billmon, Steve Gilliard, and Juan Cole. (All linked in the Kos sidebar.)
There are two other, less familiar sites, however, that I have found indispensable for staying abreast of the current crisis. One is by Stirling Newberry, who is familiar to Kos readers. He posts excellent material at Blogging of the President.
The other is by tex over at UnFair Witness.
Both have facts and insights that you are not likely to find anywhere else.