I think that the next major Dynare release should happen by late May 2013. The goal is to have a new version for the Summer School and the GPM workshop, and to keep up with our various commitments.
I have therefore created the 4.4 milestone on GitHub and associated several issues to it:
https://github.com/DynareTeam/dynare/issues?milestone=1&state=open
Some issues are already assigned to someone. Please consider claiming issues that are currently unassigned.
If you think something is missing in this list, please open a new issue (or, if the issue already exists, reassign it to milestone 4.4).
Note that there are various labels that can be assigned to issues. In particular, I use the label “decision” for those issues which cannot be solved before a collective decision has been made.