I'm not sure there will ever be a pure AWS analog in manufacturing, but http://www.dragoninnovation.com/ is pretty close to offering "Manufacturing as a Service." They've helped Pebble, MakerBot, Sifteo, Romotive, and dozens of other companies make it to the market more efficiently than if they'd run solo. I wrote this story about them at Wired (http://www.wired.com/design/2012/06/dragon-innovations-manuf...)
From the Dragon Innovation home page [1]: "As a matter of corporate policy, Dragon Innovation will not accept any job that involves transferring existing in-house manufacturing from the USA to China."