AusGamers has posted an in-depth preview of their hands-on with Diablo 3's Barbarian class, going into skills, abilities, UI and more.
From the preview:
"The Barbarian, as was described to us by Rob Pardo, is a warrior “looking for a foe worthy of his blade”. Death doesn’t scare him, rather, he invites it at every turn, provided it’s an honourable, hard-fought one. But in saying that, death won’t find him quickly thanks to his tenacious attitude and abundantly powerful skillset. The game has gone something of a grand metamorphoses since it was first announced. Skill-trees are gone in favour of a skill list and UI where you can have six active and three passive..."