The skirmish is almost complete, you can now create a game, but victory conditions are not checked yet, and some advanced features (such as shared radar, non-attackable allies, pirate behavior) are not implemented yet. But still, you should be able to play, save and load the skirmish game.
Note that many labels are still not translated into German and French.
For documentation on the new Skirmish screen, please refer to these blog posts: Galaxy, Economy and Victory tabs and Players tab.
If your Launcher doesn't seem to recognize that new version is available, please be patient. Sometimes the Google Code web access lags behind the SVN, which is out of my control.