The next version will most likely be out by the end of the summer (or end of the winter for you upside down folk). I have not yet announced which features will be in this version, but will do so as soon as I can.
As for AD integration, I am hoping to put together a how-to for this within the next couple months. If anyone can do this for me, I can put more energy into developing the next version.
Roger Martin
Creator and Lead Developer of Gallery Server Pro