I didn't think the tequila bar was opening for a while yet. We were just there at the end of November, and was told it was still a few months away. It will be located inside the Mexico pavillion - taking over where one of the shops are now.
This has been in the process for quite some time. When we were there in Sept I asked about it! I think it is going where the clothes/jewelry shop is located, but I could be wrong. In the official guide for 2008 it acts like it is open, but it isn't? Summer of '08?