The leak I am referencing is this one:
G20 summits: Russia and Turkey react with fury to spying revelations | World news | guardian.co.uk
If that leak is directly attributed to Snowden, then I am dissappointed by his lack of focus on Civil Liberty in the USA.. Opening a bunch of cans of worms is a truly retarded idea until you've finished the first can.
But the idea that major diplomats are NOT routinely bugged when they travel, is not really new.. That's why every country has a complete ANTI-Espionage squad in their entourage.
The Chinese Prez just changed his hotel at the last moment on his visit here for EXACTLY that reason..
Indignation is great acting and theatre, but it isn't anything that the "big boys" don't know.
Maybe Snowden thinks the value of this to CITIZENS, is to show how pervasively our govt ALREADY surveils friendly parties.
The Guardian says that Snowden is the source of the leak:
There have often been rumours of this kind of espionage at international conferences, but it is highly unusual for hard evidence to confirm it and spell out the detail. The evidence is contained in documents classified as top secret which were uncovered by the NSA whistleblower Edward Snowden and seen by the Guardian. They reveal that during G20 meetings in April and September 2009 GCHQ used what one document calls "ground-breaking intelligence capabilities" to intercept the communications of visiting delegations.
This included:
 Setting up internet cafes where they used an email interception programme and key-logging software to spy on delegates' use of computers;
 Penetrating the security on delegates' BlackBerrys to monitor their email messages and phone calls;
 Supplying 45 analysts with a live round-the-clock summary of who was phoning who at the summit;
 Targeting the Turkish finance minister and possibly 15 others in his party;
 Receiving reports from an NSA attempt to eavesdrop on the Russian leader, Dmitry Medvedev, as his phone calls passed through satellite links to Moscow.
GCHQ intercepted foreign politicians' communications at G20 summits | UK news | The Guardian
All disagreements about what the NSA "should" be doing are valid, and it would be an entirely different case for me if all Snowden did was expose NSA's actions against US citizens. However, he's exposing programs that are quite legal and diplomatically sensitive. The Intelligence "game" is often one of spy vs. spy and while it is suspected and assumed we're all spying on each other, confirming actual details of this activity is espionage and is harmful to our national security.
Snowden is not a civil libertarian hero, he's a turncoat attention whore willing to sell whatever he has for his own personal gain.
What kind of gain?
It's not like he gave classified information to a producer so they could make a movie.
Oh wait.
That was obama.