The attacks against the Playstation Network have slowed, but PSN is still offline in the US. I'm curious about the nature of these attacks. Are they using she

The attacks against the Playstation Network have slowed, but PSN is still offline in the US. I'm curious about the nature of these attacks. Are they using sheer network traffic or are they tying up the authentication servers with bogus requests? Has anyone seen a good technical description of what's happening?