From what I can gather here it is happening to me as well, after logging in I get something along the lines of
"Your forum account is inactive, please respond to your activation E-mail. If you have already done so, it may take up to 24 hours to activate"
I saw that this could mean that the server is down but not 100% sure if its something on my end, or if its just the server being down. Already gave it a good 26 hours and activated the forum account by going to the page stated in the e-mail; unless I actually have to give an E-mail response to it in which it is my bad.
Any info would be appretiated
EDIT: Just got past it