Garrett promised us free / the cheapest hosting on the planet with electricity rates around 0.06 usd/kWh.
Months later and two weeks after the first pieces of hardware arrive he changes this to 0.37 usd/kWh.
This operation is not viable anymore...

You are naive if you think that difficulty will stabilize at (or below) 25b (a 5-fold of what it is now). Not even a price drop to 100 usd would cause that.
It will be somewhere around 60b - 300b.

Add the fact that 50 btc went missing in November "because we were very unlucky" and another 100 btc last 2 months "due to the hardware failing, no time to reboot it, too busy making HF website". I start wondering if even the BFL delay we experienced ("they didn't ship on friday") was true.

Sam / Garrett, why the radio silence?