According to an alleged Nest engineer a couple months back, the company is on deathwatch. Of course the official word from Fadell himself is that all the bad PR doesn’t represent the company or its culture, but the evidence suggests still that financially and culturally there are lots of problems.

Now, we learn today (via Fortune) that Tony Fadell, Nest’s CEO, has had a little passion project going on in the background. Co-founded with its CEO Dave Bell, Actev Motors makes the Arrow Smart-Kart, a smart first of its kind electric go-kart with app controls and a $600 price tag…