Some months ago, we spoken about MkS timeline, witch is a general list of next tasks to do for next versions.
After some talk with the team, we finally agree for the current time line and we have created a wiki page for that.
You can read it here.
The debugger is already under progress by hlamer, and I (PasNox) nearly finished the new "code source indexing framework" used by the new Class Browser ( and later the auto completion system ).
You can enjoy ( as testing purpose :p ) the new class browser using branches/dev svn part.