According to Senator Joe Lieberman, WikiLeaks's servers are no longer being hosted by amazon.com. Here's Lieberman's full statement:
This morning Amazon informed my staff that it has ceased to host the Wikileaks website. I wish that Amazon had taken this action earlier based on Wikileaks' previous publication of classified material. The company’s decision to cut off Wikileaks now is the right decision and should set the standard for other companies Wikileaks is using to distribute its illegally seized material. I call on any other company or organization that is hosting Wikileaks to immediately terminate its relationship with them. Wikileaks’ illegal, outrageous, and reckless acts have compromised our national security and put lives at risk around the world. No responsible company – whether American or foreign – should assist Wikileaks in its efforts to disseminate these stolen materials. I will be asking Amazon about the extent of its relationship with Wikileaks and what it and other web service providers will do in the future to ensure that their services are not used to distribute stolen, classified information.