I just watched one of the more recent ones on youtube (#5 i think it was) and noticed there were NCR soldiers staggering around NV drunk and throwing up. Does this mean we will be able to get drunk in F:NV or is getting wasted for NCR rangers on R n R only?

I think the drunk animations are just a NPC animation, sorry me laddo.

I wish.

Not sure but I don't think they've implemented a drunken animation for your char.
The only thing you'll probably get to see is a more blurry vision.

I think you're right. I would guess that the drunk animations are NPC only, kind of like the smoking animations in Fallout 3. Most likely, drinking alcohol will have a similar effect to Fallout 3, and I'm not sure what that is since I generally didn't bother with it. Except that maybe it will effect dehydration in hardcoe mode.