Kingdoms of Azeroth had a recent interview with Tryen, though there wasn't much revealed that we didn't already know, it has some interesting tidbits on heroes and getting drunk.

Before the Beta, drinking effects were mentioned as possibly turning all characters into a hot female. Will new effects/consequences be implemented aside from the slurring of text, and swaying when walking?

No “hot female” effects, however you will experience the following after having a few too many drinks:
If you are more than half way drunk, you will start hiccoughing up drunk bubbles occasionally.
As you get more drunk, you start weaving when you walk.
As you decide to get even more drunk, you start slurring your words in chat.
For every 20% drunk you are, creatures appear one level lower than they actually are

Read the full interview here (http://wc3.ogresnet.com/html/interviews.php?l=tyren).