Also, the pre-order guitars seem to have universal codes...
"The Amazon Video Games team thanks you for your pre-order of Rock Band 3. Now it's time to get you your bonus code.
Here is your bonus code: BLUE-ORANGE-ORANGE-BLUE-ORANGE-ORANGE-BLUE-BLUE
This code will give you access to the Rock Band 3 pre-order bonus guitar.
How to Use Your Code:
Step 1: Insert Rock Band 3 software into your console.
Step 2: From the main menu, enter the code using your Rock Band 3 controls."
The Best Buy one should probably found as well...