User name in sidebar

Hello

I found this script in another post and it is sort of what I’ve been looking for. It basically shows the user’s name in the header when logged in:

<?php
if ( is_user_logged_in() ) {
    global $current_user;
      get_currentuserinfo();
      echo 'You are logged in as: ' . $current_user->user_login;
} else {
    echo 'you are not logged on';
};
?>

I was wondering if there is something similar for the sidebar (even a widget)?. I would only need the user’s name (and the “You are logged in as:” bit)?

Thanks for your help!!