The UK was the likely source of a series of attacks last week that took down popular Web sites in the US and South Korea, according to an analysis performed by a Vietnamese computer security researcher. The results contradict assertions made by some in the US and South Korean governments that North Korea was behind the attack. Security analysts had been skeptical of the claims, which were reportedly made in off-the-record briefings and for which proof was never delivered."
The Vietnamese security site's blog is linked from the article, but it is very slow even before Slashdotting. The researchers observed 166,908 zombies participating in the attacks — a number far larger than most earlier estimates.

http://it.slashdot.org/story/09/07/1...f-DDoS-Attacks