well there is no estimate except that we are making steady progress AND that all current “production” projects of the core developers are running on qx6-beta already … so there should be nothing stopping you from jumping in right now … what we are doing now is mainly polishing and getting our markeing act together so that when we release we can do it with a splash … and everything in place … we do already have a new documentation site for example http://www.qooxdoo.org/6.0.0-beta/docs/#/