I apologize if this has already been addressed somewhere else and I overlooked it. I've come across this engine and it looks pretty nice. From reading the specs, I see this engine is using OpenGL. I know Microsoft kinda dropped support of OpenGL with Vista (which made me kind of ill), I haven't really followed up on them "potentially" bringing full support…
I say all that to ask this: Do you currently have any issues using this engine with Windows Vista?
Support is not done by Microsoft, but by the makers of your videocard. The "big three" (AMD+ATi/nVidia/Intel) all have decent OpenGL support in Vista afaik.
I use Vista Home Premium and have had zero problems so far in using jME. And, as llama said, the video support is through the graphics card/chipset maker. I think that you can add Intel graphics chipsets to that list as well.
I am running vista too and it works great.