Is Facebook Dead Yet?

NO.

What about that one day where everyone threatened to cancel their account?

They threatened via their facebook status message. What do you think happened.

Should Kevin Rose have been where zuckerberg is now?

Zuck executed and grew the site. Kevin did not. We were rooting for kevin however.

What about these diaspora dudes? Shouldn't facebook be worried?

Diaspora is a bunch of nerds who picked a nerd name for their site, accessible only for nerds. How far do you think that is going to get them?

Mark stole the idea for the site. He shouldn't be the CEO of facebook right?

We all know ideas mean nothing. Execution means everything. Again, Mark executed and the Winklevii did not. It's a harsh reality, some people just do not understand.