The account is approved by hand and after 1-2 days granted.
It would be nice, if you write something about you (on your user-page).
EDIT:
I have nothing to do with the registration and have also no deeper rights in the wiki. If you think you have been forgotten (3-4 days), please write directly to info@factorio.com .
![Smile :)](./images/smilies/icon_e_smile.gif)
The idea was to have a similar user-registration as as for the mod-portal, but the priority is currently quite low.