And... With that, I decided to check the NVIDIA 3D set-up. I turned it off and sure enough the SLI screen indicator showed up on both games I listed above. I'm still not getting the FPS throughput I expect, but at least it looks like SLI is working on those games. It looks like I need to file a bug report with NVIDIA.
What FPS are you getting? You could have v-sync on and limited to your vertical refresh rate for your max FPS. If you expected higher, you can disable v-sync, but be aware, your monitor will still not show more than it's refresh rate allowed, even if you are getting much higher FPS.