The Kindle Fire actually has USB Debugging set to enabled by default. If you want to use it however, you'll need to set up your Windows 7 computer to recognize it.
I'm soon publishing a full screenshot-guide for this, but in the meantime here are the basic steps.
The Kindle Fire should be recognized by ADB now!
answered Dec 08 '11 at 12:34
I used this procedure. Worked like a charm!
answered Dec 05 '11 at 17:40