Max here, CTO and Co-Founder of Eight Sleep. We used 2.5M nights of sleep data to build this automated Sleep Coach feature. I'll be here all day to answer any questions from the community.
We have a microphone in the main enclosure but we don't have an audio codec which means we cannot record the audio. The only thing we can tell is whether there's been a loud noise or some sustained vibration at a specific frequency (snoring).
With the bed sensors we definitely pick up the movements of an intercourse but that is something you can only see by looking at raw data. Before sending them to the cloud, all the information about your movements get aggregated in sleep phases, this means that "sex" becomes "you are awake in bed".
A 3rd party app connected via wi-fi to the device can ask the user permission to access raw data from the device (much like facebook apps can ask for different permissions).
Yes, there a checkbox that enables the vibration when the alarm goes off. I am not aware of a wi-fi enabled vibration alarm, that would be an awesome product.
There are a few videos around showing demos we gave with pre-production prototypes (http://techcrunch.com/2015/01/27/luna-smart-mattress-cover/) unfortunately, given the type of product, it's a little hard to show on video but if you are based in SF you could swing by our office for a private demo (bring your pajamas:)).
Thanks! That's reassuring to see. I would definitely put that up somewhere on one of your pages. A history of lies in Kickstarter/Indiegogo hardware projects have led people like me to be skeptical of these things.