Yep, I saw a post in another forum, checked the area I was told, and sure enough there it was.
Went to the dealer, and they also knew about it.
The rails/trim are on order, and when they arrive, the dealer is replacing both top rails/trim with the new improved ones.

The area of concern is on the top area, above the front doors. Just at the point where the Windshield molding ends and the roof trim starts.
There is a small indent between the two areas, and the cracks were forming there.

They are stress cracks that have since been corrected, but I bet that all 2006, and '07 models have this issue.

Check your trucks!