I find it more than a little suss that Zuckerberg cashed out / dumped $1 Billion worth of shares on the opening day.

Isn't this the same Mark Zuckerberg that was alleged to have stolen the whole Facebook idea from his friends / schoolmates in the first place?

His silence is deafing also.

Well people, when these sorts of investments come along, do as Public Enemy once did and "Don't believe the hype!".