The map editor is in QA now. We will likely release an update/balance patch very soon, followed closely after by the editor. There's still some documentation to write up to support the editor while it is in QA, and I've been working on a doc to explain the XML story scripting system (it's a bit strange, and I'm the only one that seems to understand it fully ) I've been told it should be out before E3, but as always I will refrain from giving an exact date because it's out of my hands.

Sideways? Maybe they mean a parallel universe with the same time frame, but different circumstances.