This paper is providing details on the attacks in use today, suggest realistic defensive architectures and tactics, and explain the basic process required to have a chance of defending your organization against a DoS attack.
The report: https://securosis.com/assets/library/reports/Securosis_Defending-Against-DoS_FINAL.pdf
The Website: https://securosis.com/research/publication/defending-against-denial-of-service-dos-attacks
ClearSky Cyberdefense Forum 