Great News !
I may not be in a position to install Stage 4.0.0 right now. However can you please inform as to what are the updates as when compared to Stage 3.2.X ? (I guess I used Stage 3.2.1 as the last update to my Player-Stage set up).
Stage 4.0.0 is released today from its new home at GitHub.
* Download it from https://github.com/rtv/Stage/downloads
* Clone the repo at git://github.com/rtv/Stage.git
* Peruse the project page at https://github.com/rtv/Stage
I'll update the Player/Stage web site later.