update-notifier in jaunty supports per-user notifications as well. Just add:
OnlyAdminUsers: False
to the note.

And test if it really works of course ;) But it should

-- 
update-notifier message about recording mount passphrase
https://bugs.launchpad.net/bugs/352307
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Status in “ecryptfs-utils” source package in Ubuntu: In Progress
Status in ecryptfs-utils in Ubuntu Jaunty: In Progress

Bug description:
Binary package hint: ecryptfs-utils

The ecryptfs-setup-private utility is used to configure a user's encrypted-home 
or encrypted-private directory.

By default, ecryptfs-setup-private will generate a random 128-bit mount 
passphrase from /dev/urandom.

If executed on the command line, a message such as the following is displayed 
to the terminal:

************************************************************************
YOU SHOULD RECORD THIS MOUNT PASSPHRASE AND STORE IN A SAFE LOCATION:
f436f2db331b520e8879d53d012c363a
THIS WILL BE REQUIRED IF YOU NEED TO RECOVER YOUR DATA AT A LATER TIME.
************************************************************************

Jaunty now supports configuring an encrypted-home directory in the installer 
itself (with the preseed option user-setup/encrypt-home=true).

When this happens, a random mount passphrase is generated, but the user is not 
given the opportunity to record this passphrase (it was decided that this would 
interrupt the install experience).

What we desperately need, then, is for ecryptfs-setup-private to trigger an 
update-notifier message to be displayed on subsequent boots (until dismissed by 
the user).  This message to convey to the user:

 1) That a strong, random mount passphrase has been generated to encrypt their 
home directory
 2) That this passphrase should be recorded (written down, printed), and stored 
in a separate location
 3) That this passphrase would be needed if manual data recovery is ever 
necessary
 4) How to go about retrieving this passphrase
  $ ecryptfs-unwrap-passphrase $HOME/.ecryptfs/wrapped-passphrase
  Passphrase: foobar
  f436f2db331b520e8879d53d012c363a

Martin Pitt has offered to help with this.  I hope it can still make Jaunty.


:-Dustin

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