I have a plane with a bump map. The bump shows in a render but not in the GE. Using GLSL materials, and I think my graphics card is a good one (GeForce GTX 280). Blend attached. If you can see the bump when you hit P please let me know so I know it’s my hardware and not something I have/haven’t done.
I don’t see it on my machine, but then I have an ATI card and GLSL in Blender is notoriously flakey on ATI cards. If it’s not working on your Nvidia card though I suspect that there’s something more wrong. I took a quick look, but I haven’t used GLSL yet so I couldn’t see anything obvious.