Sorry but the announcement of this slipped under the radar. As part of the patch we released last Friday there was an update to the SDK. The main update was that now when you use PIE (Play In Editor) the game will no longer crash. So now you can actually run around your level and try it out. PIE still doesn't work perfect, but is more functional than before. We're still hard at work on the SDK and will keep you guys posted as we get more functionality in.