http://www.gamespot.com/pc/rpg/ddonline/preview_6104907.html
That's right! Dungeons & Dragons Online will feature combat that you'll control in real time. This will let you run through hallways, click your mouse buttons to swing your sword, use your mouse pointer as a targeting reticle for aiming arrows, and use your movement keys to dodge incoming attacks. Turbine made this unusual decision with support and input from Wizards of the Coast, the publisher of the original Dungeons & Dragons, in hopes of creating a massively multiplayer online game with truly dynamic and engaging combat. The combat system is being designed to take advantage of the instanced dungeons, and since only a small party of adventurers will be in each dungeon, the game can provide more-responsive controls (rather than having to handle an area with 100 different characters that are all running around).
According to lead designer Ken Troop, the combat system will add additional layers of strategy to the game on top of creating and developing a distinctive and powerful character with the appropriate skills and heroic feats--which are special abilities that Dungeons & Dragons characters may choose to acquire as they gain experience levels. For instance, by choosing the "dodge" feat, you'll receive a basic defensive bonus that your character will benefit from whenever you're attacked, but it will also let you perform an evasive roll-away maneuver with your keyboard. As another example, Troop explained that according to the standard pen-and-paper rules, high-level characters gain "base attack bonuses" that increase their chances to strike true in combat. This ability will be represented by special attacks that can be pulled off with good timing. So a fighter character with a +5 attack bonus might have a five-part sword attack that can be pulled off by clicking the mouse button in a correctly timed fashion.