The biggest news of the day so far would have to be the Achievements system. Linked within Blizz's Achievements page is the screenshot you see above (click to embiggen), which contains some interesting new hints for the highly anticipated haircut system that we'll be getting access to in Wrath:

• You'll be able to change:
  • Hair Style
  • Hair Color
  • Facial Hair (and presumably the attributes in that slot for other races/genders, like jewelry)
    
• It looks to be pretty cheap - the example price here is a mere 2 silver. This is surprising to me because I was pretty sure it was going to be a big gold sink.
• The barber shop looks pretty cool; apparently, this one is run by goblins, although the engineering on the chairs looks more Gnomish to me.

Alright, there's not a lot there, and as the beta has not even begun yet any of this may well change (especially the price), but it's something. By the way, does anyone have a clue as to what the icon on the top-right of the minimap is? That's where the sun/moon icon usually goes. David hazarded a guess that it's a picture of a window, indicating that you're inside; my only theory is that it's the icon for the Achievements interface, though it's oddly big and in a strange place.