I don't like to do it, but you can access internet banking directly if you have the address. I would however not make a habit of doing this as I think access it via the link on the standard bank home page is safer.
Its back online....but the site seemed to be down since last night, there were a few tweets about it. Lets see if they publish the reasons why the site was down.
Looks like the site works depending on what network you are using. Possibly a peering problem? I have seen it is unavailable for RSA web users however it works over 3g.