Those that signed up for the Xbox Live Fall update are starting to get code keys in their Email. The code key allows the code to be used on up to three consoles and allows for additional update testing of add-ons such as Bing Search, Voice Support, and the Metro interface that will be part of the Fall Update.

Upon entering the code, the additional updates are apparently not immediately downloaded to the console. Instead, it will not arrive for 3 to 5 days after entering the code. The program will continue to be ongoing, so if you registered for the preview and you don’t have a code yet, keep checking your Email.

In the meantime, testing will continue on the Fall Update, and we continue to hear that Microsoft will be turning it loose to the general public late this month.