single click login/registration with SFC

Everybody likes the “Login with Facebook” button found on several sites, doesnt he?

And what likes most I think it’s that it’s often found to be a single click button. Okay you still have to give permissions in the facebook popup but it’s not avoidable.

Is it possibile to accomplish this in SFC? I tried the register module but it shows a window in the register page and you must type an username in there.

Also, I’d like to have the possibility to grab a code or a shortcode or use a php template tag (a function) to copy/paste it directly into a template php page where I want to show this “Login/Register/Enter with Facebook” button.

Thank you.

http://wordpress.org/extend/plugins/simple-facebook-connect/