Turbine has restored game and website functionality to its titles but announced that the launch of Lord of the Rings Online: Helm's Deep is temporarily delayed.
From LotRO's Facebook page:
We are temporarily delaying the launch of Helm's Deep while we work to address remaining issues, and will provide more information later this morning. We thank you for your continued patience, and will keep you updated.[Update: According to this afternoon's update, the Helm's Deep's launch will be delayed until Wednesday. Turbine is extending its pre-purchase offers as well as the 100% XP boost and Bounder's Bounty events through today and tomorrow.]