I have had some luck in setting up a system that will do this, however, it is not as easy as I was hoping. When I have time I will put out more detail on the project. But for now I will describe what I did so you can follow. Better instructions to come later.
Dexcom Sensor with Share enabled
NightScout site on Heroku
IFTTT (If That Then This)
Internet enabled Outlet Plug
Plug Splitter
Light
Bed Shaker that rumbles whenever it is plugged in. i.e. no other controls on it.
We are still looking into how best to configure things so it acts the way we want.
I really wish Dexcom could integrate directly with IFTTT