Your engine looks very good! I'm looking forward on seeing it evolve!

I once tried to write an OpenGL game-engine too, however all I ever did was a terrible map editor and an even more terrible representation in OpenGL... I'm not very good at 3D programming! :?

However you ask for a game idea, and I have been walking around with a game-idea stuck in my mind for many many year, but I don't have the skills to let it come out... I don't know if you like it and if it is possible to do, but if you look at most of the 3D shooters that came out last year, they all had big battles and invasions, like the invasion on normandy, but what I have missed in all the 3D games in all those years is something like that but then with swords and stuff, like a 3D middle ages sword fighting game or something like that, with an invasion or a crusade... Like the braveheart battles on tv, but than in a 3D game!

Allright, keep us posted!