Our "privacy seppuku" was a pledge that we would never betray our customers under any circumstance.
The idea is that if we were ever faced with a situation where our only option was to betray our customers' confidence, we would simply shut down cryptostorm, Lavabit-style.
That promise still applies today, but we've decided to stop using the phrase "privacy seppuku" simply because most people don't know what the hell "seppuku" means.
That's the only reason it's no longer on the main page.