I would definitely stay clear of an OGL -> D3D wrapper... I don't think it's worth the immense amount of work.
i detected some times ago a nice java-direct3d wrapper ...link: http://sourceforge.net/projects/java-direct3d
general: for ATI/Catalyst/OpenGL the most likely result is:- Nvidia/Geforce is usually about twice as fast as ATI/Catalyst (or much much more in some situations)- ATI/Catalyst Direct3D is about twice as fast asa ATI/Catalyst OpenGL (or much much more in some situations)
(but please no odd name like "LWJGL" as base... better to rename both. show ppl the LWJGL page and talk about what it does and later ask them how the name was then you know what i mean)