Since I was speaking of wonderfully designed boards I recently came accross 
a warpage problem on a eight layer board that caused problems.

I was wondering if anyone here would have any suggestions in case it comes 
up again.

        ----------------    Cu                  1
        ~~~~~~~~~~~~~~~~    7628
        ~~~~~~~~~~~~~~~~    7628
        ----------------    .008 core           2/3
        ~~~~~~~~~~~~~~~~    1080
        ~~~~~~~~~~~~~~~~    1080
        ----------------    .008 core           4/5
        ~~~~~~~~~~~~~~~~    1080
        ~~~~~~~~~~~~~~~~    1080
        ----------------    .008 core           6/7
        ~~~~~~~~~~~~~~~~    1080
        ~~~~~~~~~~~~~~~~    1080
        ----------------    Cu                  8

with the 7628 layer being required for controlled impedence work.

This ties into my previous post about designers having open minds.