Well, this will either get moved into Conspiracy Theories or be locked as being too political.

I will limit my answer to this:

China getting Google to censor results: true.
Google refusing to cooperate with request for search data: true.
Other content providers with large search engines having turned over such data: true.
Carnivore: true.
Echelon, in that a system with that name exists: probably true.
NSA being both active and effective: almost certainly true.

Big conspiracy surrounding Echelon as described, probably false.
... Involving countries other than the US, including Canada, Australia and New Zealand? Definitely false.
... Involving the UK, probably false.

__________________
And you, to whom adversity has dealt the final blow
With smiling [faces] lyin' to ye' everywhere ye' go
Turn to, and put out all your strength of arm and heart and brain
And like the Mary Ellen Carter, rise again.