At this point in time, we have been forced to deactivate automatic user registration. It appears that hackers are exploiting a vulnerability in the reCAPTCHA (and CAPTCHA) module. Until we can reach a resolution for this issue, you will have to wait for administrator approval of your request to activate an account for you. We offer our deepest apologies for this inconvenience. Please understand that it is for the benefit of all the members of this site.
It appears that the latest CAPTCHA release has addressed this problem. However, we are allowing more time before we reactivate the automatic registration feature. Thanks for your patience.