Apologies for the massive spam attack on the forum, which resulted in roughly 2500 spam posts in a 9 hour period while I was volunteering at a robotics competition (no good deed goes unpunished I guess). It's now 3am here and I have to be up in a few hours to get back to volunteer tomorrow (er, today, sigh), but all the spam has been deleted.
I have turned off creating accounts on the forum and you can request an invite to the forum. (edited)
If you are a new user and got caught up in the mass blacklisting, contact support and I'll try to sort stuff out for you to be able to create an account (not until next week though).