We now have support for Optimus style support in hardware. I.e. support acceleration via the LVDS/VGA connector. However for PCs that plug directly into a nvidia 3D acceleration card, which tbh is unlikely for kiosk deployments, it doesn't work.
However IT admins and decision makers probably use such a configuration and have a bad first experience. So this bug is important to resolve.
Updated http://webconverger.org/nvidia/ to try keep uptodate with the bumblebee way of doing things.
Hint: nvidia-xconfig -query-gpu-info
I think this is fixed in http://webconverger.org/blog/entry/Webconverger_19_release/