I located the exact location of the noise. When the car was in for the couple of problems on Thursday and Friday (which were caused by the dealer in the first place!), there were a couple open campaigns that were to "check and retorque power steering damper line fittings" and "inspect/clear reed valve for air/water". Also, the area under the car where the humming is coming from, there is a "compartment" and it appears that something was done in ther because the plastic cover to this "compartment" has a huge gouge were they were trying to remove it. I am wondering if whatever they did on these campaigns if something is under that panel. All I know is the sound wasn't there when I left the car off on Thursday and I FULLY detail my car so I know there was certainly no gouge on that panel either.
Thanks for all your helpful suggestions.