Just got done with my Apple Genius Bar appointment. They don't have any parts for these MacBooks yet, also since I have a BTO machine they didn't have any to swap it with. What they did was have me order a replacement machine and then put notes in on my machine I'm allowed to return it late. So basically new machine comes in, I swap my stuff, bring in the broken speaker one for a refund. All and all really not that bad of a deal since I get to keep using mine and I get a new one as a replacement instead of having a repair.
Not sure what caused it, I'm still thinking quality control issue over bootcamp breaking the speakers. I booted into bootcamp and had the same distortion on the left speaker, so I think mine was just bad from the start.
Hope the rest of you get a repair solution that works out for you.
Are you going to go ahead and install bootcamp on your new machine?