We are working in solving the problem.
I'll keep you updated.
Status update 10:15 - we're in contact with our hosting company trying to resolve the problem.
Status update 11:30 - There is a network problem at our hosting service and they are working to resolve it, and we are waiting for them to get back to us.
Status update 12:55 - Login server is back up, we have temporary disabled the payment system.