The 1.6 branch
We try to do small steps in direction of something planned as "moin 2.0", keeping the code mostly stable. We can't promise production quality, therefore it is labeled 1.6.0alpha. If you are a developer or really brave, use this. 
You can have a look at the stuff here: http://test.wikiwikiweb.de/
We will add more concrete stuff here later.
See also MoinMoinTodo/Release 1.6.0.