"A group of hackers connected to the online imageboard 4chan, often referred to as Anonymous, have retaliated against several sites which have denied service to WikiLeaks shortly after the site started leaking secret embassy cables.
The site of Swiss bank PostFinance, which has closed the account of WikiLeaks (Wikileaks) founder Julian Assange, has been taken down and is still unavailable at the time of this writing. Hackers have also attacked PayPal but have only managed to take down the site’s blog (blog), while the service remained operational."
Hackers Defend WikiLeaks by Attacking PayPal and PostFinance
Hackers Defend WikiLeaks by Attacking PayPal and PostFinance: