I'm eagerly awaiting the opening of Mateo. To my mind, there's no bigger hole in the Durham food scene than Spanish. (Top notch Italian would run a close second.) Just noticed Mateo has a twitter feed, and there's a rudimentary website online:
No menu posted yet, but I have high hopes for this place. They've tweeted some pics of the evolving interior, and it looks like it's coming along. Some nice lighting in place, along with a very Durhamesque stamped tin ceiling.
The webpage promises an opening of Summer 2012, so hopefully they won't be too far off schedule.