Very nice work p0ss, thats exactly how open source development is supposed to work. Now everyone has a pretty good looking cemetery at their disposal for whatever purposes they should require.
One thing I would suggest changing would be that the specular reflectivity looks a bit high when the light hits the objects just right, the blender default for that is pretty high. Also, I see you have done some work on OpenGameArt on the grass textures. If there is a moss texture available it would be cool to add that around the bottoms of the stones, and maybe a bit around the corners on some of the larger objects. This would make it look a lot older.
If you are interested in working on more textures, we have several models that could use better textures. The
lizardman is the one that comes to mind at the moment but there are some others which could use improvement too. We don't currently have normal mapping working in the game yet but we are planning on doing it once we figure out exactly how.
-Buck