Sony, then Real World (via Caroline) and now Capitol/EMI. Universal and Warner could be next. Some might say its NAFTA. Others will say its the decline of CD sales in recent years. I say its a little of both. It will say on the back on the seal if its from south of the border. This isn't the same as getting an import originally intended for sale there. It won't always say if its made there or in the States. Plants in Olymphant, PA (WEA/Warner), Jacksonville, FL (EMI), and New Jersey (Sony) must have laid off people. To think the CDs could be made in mainland China like many other dry goods these days. That I wouldn't mind, though that country has widespread piracy as well as having taken in low-selling EU imports.
Like China, labour is cheaper in México than America. This could be the driving force of this latest trend. DVDs are also falling victim to this outsourcing scheme. For those, it should say on the shrink wrap. Blu-Rays, I'm not sure, but I wouldn't be surprised. They use NTSC in México, so the DVDs should work in the US and Canada, as well as Japan for that matter.
So the next time you buy a brand new CD or DVD in the United States, it could be made in México.