The Windows 7 Home Premium upgrade package vaulted to No. 1, not just in Amazon's software store, but among all electronics products on the site. Meanwhile, the Windows 7 Professional upgrade was No. 2 among software products. Amazon also has a lot of Windows 7 info on its site, as well as a paid delivery option that guarantees that the product will arrive on October 22.

Windows 7 has completely sold out of pre-orderable copies in Japan, which combines sales from the 17 retailers involved with the early orders. Apparently, this is a grand total of about 30,000 copies of the operating system, and it took 1.5 days (out of the 10 that were allocated) for this event to happen. Don't think that this offer hasn't been popular in the U.S., though; Windows 7 immediately shot to the top of Amazon sales.