Several of us, (I see you have already joined the Teaching Spanish with Web 2.0...group) are also discussing the topic of connecting students to global speakers of the target language. We would love to hear some of your ideas.
I am not teaching right now, I am delivering collaborative projects to teachers.
I think you may find lots of teachers in Aula 2.0.
Please post a message in the group and you will find great teachers there.
I can introduce you to Yaquelin or Rocío if necessary
All the best