I used to do the online thing but now they redirected me through the dept of human services and I don't know what my logon details are from when I registered 8 months ago, so I gave up.
just want to clarify - on the human services home page, you can still log in just to your c'link account - just go to the drop down box on top right corner of the screen, and choose centrelink as the site you wish to log in to

and yes, a lot of employers are electronically sending payment summaries now