1. Everything is running on dedicated hardware.
2. The system provides MongoDB, PostgreSQL too, it is just managed by us because we need this level of control to put PostgreSQL on SSD and special high CPU instance for scientific computations. Cf point 1.
3. Hosting services for the past 10 years, crossing my fingers, I have never been called in the middle of the night. But yes, the risk is there.
For Cloud Foundry, I don't know it, our solution is extremely light on resources we have full control of it and we are extremely happy with. We can hack/extend as we want and all in all, it is very few lines of code and I personally love simplicity.
Update: Ok, you are from a "Fog" provider, now I understand the defensive tone of your post. Do not worry, the goal of this note is to share what we do and give people willing to go this way some inspiration. Not trying to compete with you :)