Post here if you get in

We're in the process of delaying the release of the patch until a later date and allowing clients with both 2.0.4 and 2.0.5 to log in without any further issues. As of this moment players who have already updated to 2.0.5 may be experiencing login issues. We're aware and working to resolve the issue as soon as possible.

Thanks everyone for your patience.

Q u o t e:
Tell us how to roll back asap!

That would require you to uninstall the game and repatch to 2.0.4, which we're not currently recommending that anyone do. We're working on the issue and hope to have it resolved very soon.