I’ve received dozens of emails asking how to restore the show desktop icon once you’ve deleted it, so I have a solution for everybody: I’ve zipped up a copy of the shortcut, and you can download it here.
To put it back into the Quick Launch folder, open up explorer and then type in the following into the address bar:
Now just unzip the file and copy it into the folder, and you’ll have the show desktop shortcut back (the one with the real icon)
Note that I have no idea if this will work for 64-bit Windows, or if you have Vista installed somewhere other than your C: drive. Please let me know if it doesn’t.