Allow the user to be able to save their wireless networking password without prompting at each reboot

When rebooting the Ubuntu system, using a wireless network card to access the internet, the nmapplet keeps asking for the passphrase key. I believe this this becomes annoying for the end user each time to enter these details. I propose an option in there to "save or remember passphrase key" so the user does not have to keep entering it in each time.