As promised, here's my file encrypter/decrypter script for Nautilus.
This script requires 3 utilities (2 of which are almost always already installed by default).
1. Zenity - Used to generate the user interface dialogs, etc. (already installed on most Gnome desktop systems)
2. GnuPG - Does the actual encryption/decryption (already installed on most systems)
3. Wipe - Handles the secure file deletion (you'll probably need to apt-get this --> "sudo apt-get install wipe")
The latest version can always be downloaded here:Code:Old version removed as there have been several updates to it. Please grab the latest version from my Website.