Post is old but ill add to it, 3rd bearing going out.
2005 Plain Jane Legacy-
2007 right rear out replace under warranty
2008 left rear out replace under warranty
2011 80k miles loud droning noise from 15mph up. Actually started in 2009 about 10k miles after new tires put on.
I havent had it checked yet as its my wifes car and she needs it for work 24/7. But 90% sure its another bearing somewhere in the front.
Dont get me wrong, we still love the car for what we paid and will buy another when its time...