i made some changes to the exported maps, im usually in the irc channel (kromar5959) during the week if there are any questions.

1. i changed the specular channel so the color and not the intensity channel gets used for exporting. (map_Ks)
2. added missing map for specular hardnes (map_Ns)
3. made distinction to normal map flag, if its disabled (when using a height map) it exports to map_Disp instead of map_Bump
4. added map_refl
5. added missing emission channel (map_Ke)

in the attached pictures the links between blender and the mtl file can be seen.