The Desktop Squeegee is a easy solution for the desktop clutter that can accumulate on school Macs with local user accounts. For instance, your library "look-up" computers all get logged into as a local user called "Student". And the librarian at Pretend High complains about all the files students leave behind on the desktops. You need the squeegee.
When run the program will grab every file on the user's desktop and place it into a dated "desktop archive" inside the user's home folder. The script will save the last seven archives and delete any older. This provides a window before deleting a file which may have been left there by mistake.
1.3 UPDATE: Now compatible with OS 10.6 (Snow Leopard). Also switched around the script to delete old folders via a rm shell command to speed things up.

Setup:
1. Download the script and unzip it.
2. Set the script to automatically start on users you want to always have a clean desktop.

Settings:
You may open the script in AppleScript Editor and alter "Number of desktop archives you wish to keep."  Don't forget to save the script again as an "Application".