I think a password keeper would be a nice app for the Zune. Here is how it would work:
1.You enter a 4 digit number that you choose (kinda like the screen lock on Zune software)
2. It loads a screen that has 3 options "1. Add new, 2. See all, 3. Change code"
3. choose your option
This is my idea and tips for anyone that want to try it out if you think it will work.
