Passwords

Hi al..

Thinking of (finally !) going through all my passwords i use at all sites i use for authentication, and when required, store them (not sure which is the best method here, but i would probably want master password)

The idea is I buy a 8Gig USB stick I keep on my keyring with all passwords. (either password manager or maybe vie Keychain on OS X Basically, I use Safari and Firefox, and would want one universal way to access both browsers with the suggested password/username combos.

I read about password manager in FF, and add-ons for use with keychain, but i think storing them in keychain would be the way to go and backup the reverent files to USB....

Which would be the best method? I'm getting you can open these files up directly from USB ? This would be ideal.

Ideally, I would want keep all passwords on usb key on my keychain, that way i'll have it with me always when i'm out.