Hey, Anyone know, if there is any ETA of 0.13? Will it be this month or in 3 months? ;)

We don't have any, the graphics part of some of the tasks will begin after the steam release, so the estimate is between 1 and 3 months after the steam release.

Do you guys also plan to do a few experimental ...

For my curiosity: isn't the whole idea of the game being in Alpha that we get unstable builds. Me personally would love to just try out the current build even if it contains tons of bugs of sync issues. Now it is more or less a release candidate-release. I would prefer having an experimental build ...