Operation Payback is facing a little payback of its own. First Twitter closed the pro-Wikileaks hacker movement's account. And now we hear the Feds are shutting down some online discussion of Operation Payback attacks.

4chan-affiliated hacker group Anonymous has declared war on enemies of secret-sharing site Wikileaks. Internet war! Their first targets: PayPal, which won't facilitate donations to Wikileaks, and PostFinance, the Swiss bank that froze founder Julian Assange's accounts. Update: And Mastercard!