Hi Roy,
may be this needs a bit more explanation: the current next ist development code. It could easily contain bugs which in the worst case could damage your quad or cause a fly away. Therefore we have a flight test team, who test the next code in order to find such bugs. As soon as it looks reasonable stable, it will go to release-candidate, when more flight testers will test against any bugs. Only after that procedure the new code can be considered stable, and only then it makes sense to create publicly availabe binary packages.
We cannot give any release dates, because everyone here works on the project in his spare time, so it all depends on many circumstances. Just an example, I as a flight tester currently am grounded, because it is raining and even snowing here, so I make only very slow progress in testing the new code.