This New York Times articles describes the April – May DDOS attacks that took down a good part of Estonia’s digital infrastructure.
This is the first time in history that DDOS attacks have been considered a “national security situation”.
http://www.nytimes.com/2007/05/29/technology
/29estonia.html?_r=2&oref=slogin&oref=slogin
[Editor's note (Valle): Estonia probably could have mitigated a lot of the damage is they had had anti-DDOS protection either in the "cloud" at their ISPs or if they had appliances like the Cisco Traffic Anomaly Detector and Cisco Guard DDOS Mitigation Appliance.]
