There is usually a discussion every year so I thought I would start it.
The reviews from last year were scarce and not too encouraging: http://chowhound.chow.com/topics/835933
The spotlight is on Buenos Aires, Philadelphia, and Saguenay-Lac-St-Jean.
I currently have a reservation at Laloux where Vedge (http://www.vedgerestaurant.com/) is the invited restaurant. My GF doesn't eat meat so it's a good fit and I've heard good things about it.
I am also looking for suggestions on vegetarian/pescatarian friendly Buenos Aires chefs. If there was no budget or food restrictions I probably would have booked either Aramburu at Chez l'Épicier or Le Mirazur at Maison Boulud.