Once the Doom 3 engine is liscensed out there will be a slew of bump-mapped games, but what is out there now? I do remember Evolva having a patch to support bump-mapping, and that the said ...
This is just a wild guess.. but the nvidia demos where opengl demos and 3dmark is d3d.. possibly the geforce cannot? or does not have the driver support to do environmental bump mapping in direct 3d.