The Feedback tool is all over Windows 7 beta; just recently, I learned the trick on how to remove it from Jojo Ayson, Microsoft Philippines' most popular Technology Specialist--a heartthrob in effect 
Now on with the trick:
1. Launch regedit.exe.
2. Locate HKEY_CURRENT_USER\ControlPanel\Desktop.
3. Edit FeedbackToolEnabled REG_DWORD value from 3 to 0.
4. Restart your computer and viola! no more Feedback tool.
I have to tell you though that while Windows 7 is still in its beta stage, we ought to use the Feedback tool whenever we encounter problems so when it finally comes out it becomes more of a workstation than a problem.
Cheers!