What? You were expecting something more? A few paragraphs at least? Ok, ok, you twisted our arms enough. Mortal Online is the new PvP MMO that everyone's squeeing about -- one that's set up to attempt to out Darkfall, well, Darkfall.
Sporting game systems very closely related to Darkfall's, such as skill based progression and action based combat, Mortal Online is a PvP, action based, first person MMO being run on the Unreal Engine. From what we've been able to see from the in-game footage, MO will be a bit slower combat-wise when compared to Darkfall, but will feature more interactivity between the user and the environment through well placed camera angles and the ability to see your own body.
The video shows horse riding, dungeon crawling with a torch in one hand and sword in the other, mounted combat, and even a peek at siege weaponry through the use of a ballista. If it sounds like something you're interested in, jump on over to their main webpage or download the official video through their torrent.
[Thanks, Jonathan, Daniel, Amisch, and Brian!]