Nex-Gen gaming news site posted a comprehensive preview of Funcom's upcoming MMO:

Aside from the above-average quality of its storytelling, the major difference with other MMOGs is that much of this isn't multiplayer at all - originally, this entire section was intended to be singleplayer only, ensuring that newbies were comprehensively tutored in the ways of low-level battle before being unleashed into the wider, multiplayer world. This has now been replaced by a compromise, however: during the day, Tortage is multiplayer, allowing you to perform quests socially that don't affect the advancement of the story; at night time, a state which you initiate by sleeping, the game becomes instanced and effectively singleplayer.

You can read the rest at Nex-Gen.biz