2007 Edge AWD and 97K, wife just told me about the growling after 3 weeks of driving. Awesome, maybe could have mentioned it 3 weeks ago. I found the TSB files on replacing BOTH 10-2-9 which needs the Trailing Arm, Trailing Arm Knuckle and the Hub Assembly.
Mines out of warranty anyway, but with these reports I can go shop it around to different places and see what this will cost damage-wise. I guess the important part is not having the Hub Assembly replaced only, the knuckle or link arms need to be done as well as the bearings.
I found JPGs of what another member posted here: http://www.fordedgeforum.com/index.php?/topic/6823-can-someone-post-tsb-10-2-9/
They are towards the bottom of the page.