You don't need to 'sign-up' it isn't the Navy. I don't have to send out the 'press gang' men either and force you to compete. The more the merrier; I want to see what you all can do to impress me or show what skills you have learnt from the SP forums so far.

It will all become clear in February, we'll set you the Challenge and when you've completed it there will probably be a thread where you can submit your work or answers, etc.