Update: Ibn just posted word that the issue has been resolved.
A few news items coming in about Zone issues and having to download the Zone software files.
Ibn has posted word over on the Turbine Forums
Microsoft is aware that there are currently problems with the Zone login for Asheron’s Call and they are working to resolve them. As soon as I have more information or an ETA I will update this thread.
Alex “Ibn” Beckers
AC1 Online Community Relations