As shipped, OS X includes an alias to the OS 9 desktop folder. However, it's relatively easy to accidentally delete, which makes finding the original OS 9 desktop a bit more problematic. An anonymous reader sent in an easy one-line fix in the terminal:
ln -s /"Desktop Folder" ~/Desktop/"Desktop (Mac OS 9)"This will place an alias of your OS 9 desktop back on your new OS X desktop.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020222085207409