I need help with passwordless SSH

[RobinVossen]

Hello,
Well I kinda need help with Passwordless SSH.
I know there are TONS(!) of Tutorials out there. And I did take a look at nearly all of them.
But I kinda need help with how the Authorized_keys file looks.
How should it look? Can somebody give me a example with a authorized_keys file and the id_dsa.pub file that the Client Uses to connect to it?
I know that setting it up like this is more secure then letting my users remember passwords.. So I did Disable password Authentication and I have Only allowed Key(Passwordless) Authentication.
Oh the reason why its insecure letting my users remember a password is since they'd put it in a email or something. Now they need to plugin there USB-Drive to get access to there SSH. (this all goes to a "Secure" server that has access to our Firewall..)
But ok anyone who can give me a Authorized_keys and a id_dsa.pub file that should be with it so I know why they dont work?

Cheers,
Robin

Edit:
When I try

ssh-copy-id localhost

on the localbox to copy it later on I get

Couldn't open /dev/null: Permission denied

but WHY does he need access to /dev/null :S
I dont want to trow anything in the Void

Oh, and I didnt change anything with the rights for /dev/null but the rights on it are:

crw-r--r-- root

[Lazydog]

Did you get you answer to this question?
I'm at work now but will help you when I get home.

[RobinVossen]

Yes its been solved.
Something weird.. Cant explain

Thanks alot anyhow