If you go to https://atom.io/docs you can authorize the app with your github acc...

eik3_de on Feb 26, 2014 | parent | context | favorite | on: GitHub's new text editor leaked on Twitter

If you go to https://atom.io/docs you can authorize the app with your github account. You still get the 'soon' page afterwards, but at least you're now something like an early atom.io beta user ;)