Alain,
Planning for those features sets, how they will sit, what will need to get reimplemented to accomodate it all and so on are already taking place. So from planning, to implementation to really (not include betas/milestones) we are probably looking at Q2 2007 sometime. Seems like a long time away I know, but we still have 5.0.3 and 5.1 ontop of us that will be comming out by years end I believe, then we have planning for 5.x or 6.0, whichever management decides is next.