Due to a sharp rise in spamming to the forums recently I have had to disable automatic registration approval. If you wish a new account activating on this board then please sign up as normal but then send an email to firstname.lastname@example.org including the username you chose during registration and requesting that your account gets activated (i.e. this manual email will be in addition to the one that automatically gets sent to Administrators as part of the registration process).
I may try to implement some form of kaptcha to curtail robot registrations and allow the return of automatic approval but given that many of the accounts being created are from gmail addresses which already has a kaptcha system in place I can't see this being very effective.
For the foreseeable future I think we will need to rely on this manual step to keep the spammers out and allow the real users in.