My screenshots from the beta:
http://www.semi0.com/images/wow/
I'm currently a level 27 human warrior on US East Bloodhoof server (as if anyone cares). I don't like warrior as much as mage so far, but mage was gimped for armor.
I wanted to be paladin, but figured Blizzard would likely change around their abilities. As of now paladins can wear all armor, use all weapons, heal, and cast spells. I thought for sure Blizzard would take away their superman abilities.