Lots of people use keepass to save their passwords. I see two limitations there: it saves its password database only on one machine and it doesn't provide a way to backup the database. If something happens with your hard drive or somebody deletes the file you are going to lose everything.

Also I don't like the idea of storing passwords online or copying the password database to cloud services "unprotected" (I don't believe everybody use a secure passphrase and change it often enough).

Password-copy tries to solve these problems. It ciphers the file with a key (using gpg) and saves a backup after every change.

It's designed to save your time. It opens your encrypted file located in UbuntuOne/Dropbox/a flashdrive, decrypt it, launches keepassx, encrypt the file again.