Thanks for your reply.
Actually there's significant bitcoin activity in several countries in LatAm. There are working exchanges (that I know of) in Brazil, Argentina, Chile, Mexico, Colombia, Venezuela, just to name a few. In my country (which is smaller, and sits next to, one of the mentioned) the crypto-currencies community is still small, and operates mainly in a person-to-person basis. I believe an exchange here would be definitely welcome by the community, although it might take some time to become really popular. I'm talking about maybe 5-10K users during the first year, and that's being optimistic.
That said, I am interested in starting a project like this before someone else (for someone will, eventually) but I don't really know who to partner with, in terms of a software solution.