I have an 06 5AT...i get it when coming out of my driveway too!!! although i do have a nasty angle.

 

i have an 06AT w/ sports package but i have s-techs so im assuming its normal? it kinda sounds like a little clunk and it only happens when im going >10mph and hit a bump. maybe i should recheck my suspension although since i did it myself i double checked everything

 

happens to me all time, from sunroof area, got used to it....prob from flexing

 

I had this issue as well. It's usually the swaybar end links can cause this noise. It's a cheap part...it goes for $25-30 each. I just had mine replaced @ 32k miles. Problem solved.