
Researcher by Wong Onn Chee discovered a way to cause a website to be slow and even take it down via a technique where POSTs are sent to a website slowly causing gridlocks the connection. It's similar to the Slowloris HTTP DDOS attack by RSnake, however this slow POST attack can't be mitigated by load-balancers like the Slowloris one can.
Check it out:
http://www.darkreading.com/vulnerability_management/security/attacks/showArticle.jhtml?articleID=228000532