We are performing some maintenance work that will impact the account creation experience between 6:00-7:00 GMT on 27th June. During this time, users will not be able to create a new account. We apologize for any inconvenience this may cause. We will update this post once the work has been completed.
[UPDATE:27/06/2012@06:45GMT] Maintenance has been finished and it is possible to create new accounts again.