Orph...it's not available to buy until next year. They're just running a preview for the next few days.
Gameplay is similar to Diablo - not overly complex like Everquest (which I played for about 20mins before uninstalling). You simply join a party and go off on some adventure
Graphics are really nice and the controls are nice and simple too. It's streamed so they can add new features/quests/events really easily so there will always be new things to do.
In fact, the closest thing I can compare it to is the multiplayer aspect of Baldurs Gate: Dark Alliance on the PS2, but with more scope.
[addsig]