Amazon.com is limiting preorders of the PS3 Slim to one per household, claiming that the device is already in short supply across the U.S.

That sure didn't take long. Despite being unveiled only two days ago, the 120 GB PlayStation 3 now sits firmly atop Amazon's best-seller list, muscling its way past Wii Sports Resort, Halo 3: ODST and even the venerable Wii itself. So even though it's only officially existed for 48 hours and won't actually be on shelves until September 1, it should come as no great surprise that supply shortages are already being predicted and as a result, Amazon has elected to limit preorders of the console to one per household in the U.S.

"As you may know, the PlayStation 3 120 GB is in great demand," the company said in a message posted on the PS3 preorder site. "In an effort to provide as many customers as possible with the opportunity to purchase [the] PlayStation 3 120 GB, we are limiting the total number of PlayStation 3 120 GB units that can be purchased. As a result, each household may only purchase one PlayStation 3 120 GB unit."

Preorder limits have also been imposed in the U.K., although their supply situation apparently isn't quite as desperate as ours: In order to ensure that everybody gets a PS3 Slim, Amazon.co.uk is limiting preorders per household to a maximum o