We've been working to restore normal access for all users. We hope to have it resolved soon.
We're also working on a server upgrade that should be ready very soon and will reduce the effect of this type of attack.
We apologize for the inconvenience, and appreciate your patience while we work to resolve this.
Liam
Update: This should now be resolved. See this announcement for more information.
Edited by Liam, Dec 13 2011, 03:28 AM.