I agree there REALLY needs to be full plug-in support for any current version officially released. Otherwise I would prefer for them to refer to it as Beta so we know it is being worked on.
One thing I use on a regular basis in the Poser plug-in due to my workflow. Without it, I really would not consider ZBrush for my use and I know others are fond of many plug-ins for their workflow too. That is why I REALLY hope we see some sort of announcement at least that plug-ins like the ones found in 3.1 are in development and some idea as to the progress or support coming.
I really want to love ZBrush, but sometimes they just don’t have very good PR about what is going on and current status updates. It seems like things get delayed for years with no word about even if they are still alive and what they are working on.