I have written about previous GE versions of the sleigh. This year “GE scientists are turning to the crowd and the power of 3D printing to design a whole new sleigh for Santa that will ensure he makes all of his deliveries this holiday season.”
Some of the entries already submitted on GrabCAD’s site
In the meantime, as more of holiday gift requests and fulfillments flow through ecommerce sites BusinessWeek describes Santa's other sleigh
"At mighty Amazon, the omniscient computer program that practically runs the company’s supply chain is known internally as the Mechanical Sensei. The program tracks all the items and orders coursing through Amazon’s systems. It makes millions of small decisions, such as how much of a particular product Amazon should buy, and—given the geographic dynamic of demand for that particular —where in its massive network of fulfillment centers to store it.'