As promised two days ago, Blizzard has released a set of exclusive images on their Facebook page. However, Facebook's resolution limitations don't allow you to appreciate the full glory of those screenshots. So they've also sent us the hi-res versions of each, 2560x1600 for the in-game shots and 1950x2266 for the artwork.
Check them out below, and be sure to "Like" the Diablo Facebook page to get more! They'll be releasing new images for every 25,000 fans from here out. The screenshots showcase the male Witch Doctor using his blow dart ability, and the female Demon Hunter. The artwork is King Leoric by Brom.
Update: Blizzard has released a fourth image, this one is artwork of the Witch Doctor's Zombie Wall ability.