Actually that's quite brilliant.
You could have an entire 'leaker' infrastructure that uses bitcoin - and they can sign messages with their key to prove that it was from 'them', whoever they are, without having to reveal their identity. You could have a complete social-like ranking based on the facts you disclose that you can tie to a particular whistleblower.
Stand aside Wikileaks, you could run your own site within tor or just throw stuff up on pastebin via several proxies/and tor.
But, but, how would government survive this?