Pat Dollard has the story on their rescue which was pulled off by Iraqi soldiers with a little back up by Coalition forces. Another great read - Heroic Sheiks Beaten With Tire Irons, Humiliated: “We Will Stay The Course”
BAGHDAD - It had to be done quickly. Rogue Shiite militiamen were holding hostage a group of Sunni and Shiite tribal sheiks who had joined a revolt against al-Qaida. For the Iraqi government and its U.S. backers, the seven men represented an inspiring symbol of national unity.
A daring rescue operation secured their freedom.
* UPDATE *
Also from Pat Dollard - Diyala Sunni And Shiite Tribes Reach Historic Alliance
I initially thought this was the same group, but it might be another Diyala Awakening. Either way, it's worth reading.